diff --git a/Cargo.lock b/Cargo.lock
index 33783473..c3ec90cb 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -11,7 +11,7 @@ dependencies = [
  "futures-core",
  "futures-sink",
  "log",
- "pin-project",
+ "pin-project 0.4.27",
  "tokio",
  "tokio-util",
 ]
@@ -37,9 +37,9 @@ dependencies = [
 
 [[package]]
 name = "actix-http"
-version = "2.0.0"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05dd80ba8f27c4a34357c07e338c8f5c38f8520e6d626ca1727d8fecc41b0cab"
+checksum = "404df68c297f73b8d36c9c9056404913d25905a8f80127b0e5fe147c9c4b9f02"
 dependencies = [
  "actix-codec",
  "actix-connect",
@@ -71,7 +71,7 @@ dependencies = [
  "log",
  "mime",
  "percent-encoding",
- "pin-project",
+ "pin-project 1.0.2",
  "rand",
  "regex",
  "serde",
@@ -79,7 +79,7 @@ dependencies = [
  "serde_urlencoded",
  "sha-1",
  "slab",
- "time 0.2.22",
+ "time 0.2.23",
 ]
 
 [[package]]
@@ -147,7 +147,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0052435d581b5be835d11f4eb3bce417c8af18d87ddf8ace99f8e67e595882bb"
 dependencies = [
  "futures-util",
- "pin-project",
+ "pin-project 0.4.27",
 ]
 
 [[package]]
@@ -207,15 +207,15 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "log",
- "pin-project",
+ "pin-project 0.4.27",
  "slab",
 ]
 
 [[package]]
 name = "actix-web"
-version = "3.1.0"
+version = "3.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c1b12fe25e11cd9ed2ef2e428427eb6178a1b363f3f7f0dab8278572f11b2da1"
+checksum = "88344b7a5ef27e5e09e73565379f69273dd3e2d29e82afc381b84d170d0a5631"
 dependencies = [
  "actix-codec",
  "actix-http",
@@ -239,22 +239,22 @@ dependencies = [
  "fxhash",
  "log",
  "mime",
- "pin-project",
+ "pin-project 1.0.2",
  "regex",
  "serde",
  "serde_json",
  "serde_urlencoded",
  "socket2",
- "time 0.2.22",
- "tinyvec 1.0.1",
+ "time 0.2.23",
+ "tinyvec",
  "url",
 ]
 
 [[package]]
 name = "actix-web-codegen"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "750ca8fb60bbdc79491991650ba5d2ae7cd75f3fc00ead51390cfe9efda0d4d8"
+checksum = "ad26f77093333e0e7c6ffe54ebe3582d908a104e448723eec6d43d08b07143fb"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -263,9 +263,9 @@ dependencies = [
 
 [[package]]
 name = "addr2line"
-version = "0.13.0"
+version = "0.14.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b6a2d3371669ab3ca9797670853d61402b03d0b4b9ebf33d677dfa720203072"
+checksum = "7c0929d69e78dd9bf5408269919fcbcaeb2e35e5d43e5815517cdc6a8e11a423"
 dependencies = [
  "gimli",
 ]
@@ -278,9 +278,9 @@ checksum = "ee2a4ec343196209d6594e19543ae87a39f96d5534d7174822a3ad825dd6ed7e"
 
 [[package]]
 name = "aho-corasick"
-version = "0.7.13"
+version = "0.7.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "043164d8ba5c4c3035fec9bbee8647c0261d788f3474306f93bb65901cae0e86"
+checksum = "7404febffaa47dac81aa44dba71523c9d069b1bdc50a77db41195149e17f68e5"
 dependencies = [
  "memchr",
 ]
@@ -294,12 +294,6 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
-[[package]]
-name = "arc-swap"
-version = "0.4.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d25d88fd6b8041580a654f9d0c581a047baee2b3efee13275f2fc392fc75034"
-
 [[package]]
 name = "async-trait"
 version = "0.1.41"
@@ -330,9 +324,9 @@ checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
 [[package]]
 name = "awc"
-version = "2.0.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "150e00c06683ab44c5f97d033950e5d87a7a042d06d77f5eecb443cbd23d0575"
+checksum = "425980a1e58e5030a3e4b065a3d577c8f0e16142ea9d81f30614eae810c98577"
 dependencies = [
  "actix-codec",
  "actix-http",
@@ -340,6 +334,7 @@ dependencies = [
  "actix-service",
  "base64",
  "bytes 0.5.6",
+ "cfg-if 1.0.0",
  "derive_more",
  "futures-core",
  "log",
@@ -353,9 +348,9 @@ dependencies = [
 
 [[package]]
 name = "backtrace"
-version = "0.3.53"
+version = "0.3.54"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "707b586e0e2f247cbde68cdd2c3ce69ea7b7be43e1c5b426e37c9319c4b9838e"
+checksum = "2baad346b2d4e94a24347adeee9c7a93f412ee94b9cc26e5b59dea23848e9f28"
 dependencies = [
  "addr2line",
  "cfg-if 1.0.0",
@@ -367,9 +362,9 @@ dependencies = [
 
 [[package]]
 name = "base-x"
-version = "0.2.6"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b20b618342cf9891c292c4f5ac2cde7287cc5c87e87e9c769d617793607dec1"
+checksum = "a4521f3e3d031370679b3b140beb36dfe4801b09ac77e30c61941f97df3ef28b"
 
 [[package]]
 name = "base64"
@@ -480,9 +475,9 @@ dependencies = [
 
 [[package]]
 name = "cc"
-version = "1.0.60"
+version = "1.0.62"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ef611cc68ff783f18535d77ddd080185275713d852c4f5cbb6122c462a7a825c"
+checksum = "f1770ced377336a88a67c473594ccc14eca6f4559217c34f64aac8f83d641b40"
 
 [[package]]
 name = "cexpr"
@@ -555,18 +550,18 @@ dependencies = [
 
 [[package]]
 name = "const_fn"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce90df4c658c62f12d78f7508cf92f9173e5184a539c10bfe54a3107b3ffd0f2"
+checksum = "c478836e029dcef17fb47c89023448c64f781a046e0300e257ad8225ae59afab"
 
 [[package]]
 name = "cookie"
-version = "0.14.2"
+version = "0.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1373a16a4937bc34efec7b391f9c1500c30b8478a701a4f44c9165cc0475a6e0"
+checksum = "784ad0fbab4f3e9cef09f20e0aea6000ae08d2cb98ac4c0abc53df18803d702f"
 dependencies = [
  "percent-encoding",
- "time 0.2.22",
+ "time 0.2.23",
  "version_check",
 ]
 
@@ -584,11 +579,11 @@ checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
 
 [[package]]
 name = "crc32fast"
-version = "1.2.0"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba125de2af0df55319f41944744ad91c71113bf74a4646efff39afe1f6842db1"
+checksum = "81156fece84ab6a9f2afdb109ce3ae577e42b1228441eded99bd77f627953b1a"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
 ]
 
 [[package]]
@@ -631,11 +626,11 @@ checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
 
 [[package]]
 name = "encoding_rs"
-version = "0.8.24"
+version = "0.8.26"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a51b8cf747471cb9499b6d59e59b0444f4c90eba8968c4e44874e92b5b64ace2"
+checksum = "801bbab217d7f79c0062f4f7205b5d4427c6d1a7bd7aafdd1475f7c59d62b283"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
 ]
 
 [[package]]
@@ -696,13 +691,19 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "error-chain"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9435d864e017c3c6afeac1654189b06cdb491cf2ff73dbf0d73b0f292f42ff8"
+
 [[package]]
 name = "flate2"
-version = "1.0.18"
+version = "1.0.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da80be589a72651dcda34d8b35bcdc9b7254ad06325611074d9cc0fbb19f60ee"
+checksum = "7411863d55df97a419aa64cb4d2f167103ea9d767e2c54a1868b7ac3f6b47129"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "crc32fast",
  "libc",
  "miniz_oxide",
@@ -729,6 +730,16 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "00b0228411908ca8685dba7fc2cdd70ec9990a6e753e89b6ac91a84c40fbaf4b"
 
+[[package]]
+name = "form_urlencoded"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ece68d15c92e84fa4f19d3780f1294e5ca82a78a6d515f1efaabcc144688be00"
+dependencies = [
+ "matches",
+ "percent-encoding",
+]
+
 [[package]]
 name = "fuchsia-zircon"
 version = "0.3.3"
@@ -747,15 +758,15 @@ checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
 
 [[package]]
 name = "futures"
-version = "0.1.29"
+version = "0.1.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1b980f2816d6ee8673b6517b52cb0e808a180efc92e5c19d02cdda79066703ef"
+checksum = "4c7e4c2612746b0df8fed4ce0c69156021b704c9aefa360311c04e6e9e002eed"
 
 [[package]]
 name = "futures"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d8e3078b7b2a8a671cb7a3d17b4760e4181ea243227776ba83fd043b4ca034e"
+checksum = "9b3b0c040a1fe6529d30b3c5944b280c7f0dcb2930d2c3062bca967b602583d0"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -768,9 +779,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7a4d35f7401e948629c9c3d6638fb9bf94e0b2121e96c3b428cc4e631f3eb74"
+checksum = "4b7109687aa4e177ef6fe84553af6280ef2778bdb7783ba44c9dc3399110fe64"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -778,15 +789,15 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d674eaa0056896d5ada519900dbf97ead2e46a7b6621e8160d79e2f2e1e2784b"
+checksum = "847ce131b72ffb13b6109a221da9ad97a64cbe48feb1028356b836b47b8f1748"
 
 [[package]]
 name = "futures-executor"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cc709ca1da6f66143b8c9bec8e6260181869893714e9b5a490b169b0414144ab"
+checksum = "4caa2b2b68b880003057c1dd49f1ed937e38f22fcf6c212188a121f08cf40a65"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -795,15 +806,15 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5fc94b64bb39543b4e432f1790b6bf18e3ee3b74653c5449f63310e9a74b123c"
+checksum = "611834ce18aaa1bd13c4b374f5d653e1027cf99b6b502584ff8c9a64413b30bb"
 
 [[package]]
 name = "futures-macro"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f57ed14da4603b2554682e9f2ff3c65d7567b53188db96cb71538217fc64581b"
+checksum = "77408a692f1f97bcc61dc001d752e00643408fbc922e4d634c655df50d595556"
 dependencies = [
  "proc-macro-hack",
  "proc-macro2",
@@ -813,24 +824,24 @@ dependencies = [
 
 [[package]]
 name = "futures-sink"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0d8764258ed64ebc5d9ed185cf86a95db5cac810269c5d20ececb32e0088abbd"
+checksum = "f878195a49cee50e006b02b93cf7e0a95a38ac7b776b4c4d9cc1207cd20fcb3d"
 
 [[package]]
 name = "futures-task"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4dd26820a9f3637f1302da8bceba3ff33adbe53464b54ca24d4e2d4f1db30f94"
+checksum = "7c554eb5bf48b2426c4771ab68c6b14468b6e76cc90996f528c3338d761a4d0d"
 dependencies = [
  "once_cell",
 ]
 
 [[package]]
 name = "futures-util"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a894a0acddba51a2d49a6f4263b1e64b8c579ece8af50fa86503d52cd1eea34"
+checksum = "d304cff4a7b99cfb7986f7d43fbe93d175e72e704a8860787cc95e9ffd85cbd2"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -839,7 +850,7 @@ dependencies = [
  "futures-sink",
  "futures-task",
  "memchr",
- "pin-project",
+ "pin-project 1.0.2",
  "pin-utils",
  "proc-macro-hack",
  "proc-macro-nested",
@@ -878,9 +889,9 @@ dependencies = [
 
 [[package]]
 name = "gimli"
-version = "0.22.0"
+version = "0.23.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aaf91faf136cb47367fa430cd46e37a788775e7fa104f8b4bcb3861dc389b724"
+checksum = "f6503fe142514ca4799d4c26297c4248239fe8838d827db6bd6065c6ed29a6ce"
 
 [[package]]
 name = "glob"
@@ -890,9 +901,9 @@ checksum = "9b919933a397b79c37e33b77bb2aa3dc8eb6e165ad809e58ff75bc7db2e34574"
 
 [[package]]
 name = "h2"
-version = "0.2.6"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "993f9e0baeed60001cf565546b0d3dbe6a6ad23f2bd31644a133c641eccf6d53"
+checksum = "5e4728fd124914ad25e99e3d15a9361a879f6620f63cb56bbb08f95abb97a535"
 dependencies = [
  "bytes 0.5.6",
  "fnv",
@@ -905,6 +916,7 @@ dependencies = [
  "tokio",
  "tokio-util",
  "tracing",
+ "tracing-futures",
 ]
 
 [[package]]
@@ -924,9 +936,9 @@ dependencies = [
 
 [[package]]
 name = "hermit-abi"
-version = "0.1.16"
+version = "0.1.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4c30f6d0bc6b00693347368a67d41b58f2fb851215ff1da49e90fe2c5c667151"
+checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
 dependencies = [
  "libc",
 ]
@@ -1009,11 +1021,11 @@ dependencies = [
 
 [[package]]
 name = "instant"
-version = "0.1.7"
+version = "0.1.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "63312a18f7ea8760cdd0a7c5aac1a619752a246b833545e3e36d1f81f7cd9e66"
+checksum = "cb1fc4429a33e1f80d41dc9fea4d108a88bec1de8053878898ae448a0b52f613"
 dependencies = [
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
 ]
 
 [[package]]
@@ -1060,7 +1072,7 @@ dependencies = [
  "actix-web",
  "base64",
  "flate2",
- "futures 0.3.6",
+ "futures 0.3.8",
  "hex",
  "libc",
  "log",
@@ -1076,6 +1088,7 @@ dependencies = [
  "tokio",
  "tokio-io",
  "tss-esapi",
+ "zmq",
 ]
 
 [[package]]
@@ -1098,9 +1111,9 @@ checksum = "830d08ce1d1d941e6b30645f1a0eb5643013d835ce3779a5fc208261dbe10f55"
 
 [[package]]
 name = "libc"
-version = "0.2.78"
+version = "0.2.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa7087f49d294270db4e1928fc110c976cd4b9e5a16348e0a1df09afa99e6c98"
+checksum = "4d58d1b70b004888f764dfbf6a26a3b0342a1632d33968e4a179d8011c760614"
 
 [[package]]
 name = "libloading"
@@ -1120,9 +1133,9 @@ checksum = "8dd5a6d5999d9907cda8ed67bbd137d3af8085216c2ac62de5be860bd41f304a"
 
 [[package]]
 name = "lock_api"
-version = "0.4.1"
+version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "28247cc5a5be2f05fbcd76dd0cf2c7d3b5400cb978a28042abcd4fa0b3f8261c"
+checksum = "dd96ffd135b2fd7b973ac026d28085defbe8983df057ced3eb4f2130b0831312"
 dependencies = [
  "scopeguard",
 ]
@@ -1170,9 +1183,20 @@ dependencies = [
 
 [[package]]
 name = "memchr"
-version = "2.3.3"
+version = "2.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
+
+[[package]]
+name = "metadeps"
+version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3728d817d99e5ac407411fa471ff9800a778d88a24685968b36824eaf4bee400"
+checksum = "73b122901b3a675fac8cecf68dcb2f0d3036193bc861d1ac0e1c337f7d5254c2"
+dependencies = [
+ "error-chain",
+ "pkg-config",
+ "toml",
+]
 
 [[package]]
 name = "mime"
@@ -1182,9 +1206,9 @@ checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
 
 [[package]]
 name = "miniz_oxide"
-version = "0.4.2"
+version = "0.4.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c60c0dfe32c10b43a144bad8fc83538c52f58302c92300ea7ec7bf7b38d5a7b9"
+checksum = "0f2d26ec3309788e423cfbf68ad1800f061638098d76a83681af979dc4eda19d"
 dependencies = [
  "adler",
  "autocfg",
@@ -1217,7 +1241,7 @@ checksum = "0840c1c50fd55e521b247f949c241c9997709f23bd7f023b9762cd561e935656"
 dependencies = [
  "log",
  "mio",
- "miow 0.3.5",
+ "miow 0.3.6",
  "winapi 0.3.9",
 ]
 
@@ -1246,9 +1270,9 @@ dependencies = [
 
 [[package]]
 name = "miow"
-version = "0.3.5"
+version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "07b88fb9795d4d36d62a012dfbf49a8f5cf12751f36d31a9dbe66d528e58979e"
+checksum = "5a33c1b55807fbed163481b5ba66db4b2fa6cde694a5027be10fb724206c5897"
 dependencies = [
  "socket2",
  "winapi 0.3.9",
@@ -1277,9 +1301,9 @@ dependencies = [
 
 [[package]]
 name = "num-derive"
-version = "0.3.2"
+version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f09b9841adb6b5e1f89ef7087ea636e0fd94b2851f887c1e3eb5d5f8228fab3"
+checksum = "876a53fff98e03a936a674b29568b0e605f06b29372c2489ff4de23f1949743d"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1317,15 +1341,15 @@ dependencies = [
 
 [[package]]
 name = "object"
-version = "0.21.1"
+version = "0.22.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37fd5004feb2ce328a52b0b3d01dbf4ffff72583493900ed15f22d4111c51693"
+checksum = "8d3b63360ec3cb337817c2dbd47ab4a0f170d285d8e5a2064600f3def1402397"
 
 [[package]]
 name = "once_cell"
-version = "1.4.1"
+version = "1.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "260e51e7efe62b592207e9e13a68e43692a7a279171d6ba57abd208bf23645ad"
+checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"
 
 [[package]]
 name = "opaque-debug"
@@ -1362,9 +1386,9 @@ dependencies = [
 
 [[package]]
 name = "parking_lot"
-version = "0.11.0"
+version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a4893845fa2ca272e647da5d0e46660a314ead9c2fdd9a883aabc32e481a8733"
+checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
 dependencies = [
  "instant",
  "lock_api",
@@ -1400,18 +1424,38 @@ checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
 
 [[package]]
 name = "pin-project"
-version = "0.4.26"
+version = "0.4.27"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ffbc8e94b38ea3d2d8ba92aea2983b503cd75d0888d75b86bb37970b5698e15"
+dependencies = [
+ "pin-project-internal 0.4.27",
+]
+
+[[package]]
+name = "pin-project"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "13fbdfd6bdee3dc9be46452f86af4a4072975899cf8592466668620bebfbcc17"
+checksum = "9ccc2237c2c489783abd8c4c80e5450fc0e98644555b1364da68cc29aa151ca7"
 dependencies = [
- "pin-project-internal",
+ "pin-project-internal 1.0.2",
 ]
 
 [[package]]
 name = "pin-project-internal"
-version = "0.4.26"
+version = "0.4.27"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c82fb1329f632c3552cf352d14427d57a511b1cf41db93b3a7d77906a82dcc8e"
+checksum = "65ad2ae56b6abe3a1ee25f15ee605bacadb9a764edaba9c2bf4103800d4a1895"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "pin-project-internal"
+version = "1.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8e8d2bf0b23038a4424865103a4df472855692821aab4e4f5c3312d461d9e5f"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1420,9 +1464,9 @@ dependencies = [
 
 [[package]]
 name = "pin-project-lite"
-version = "0.1.10"
+version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e555d9e657502182ac97b539fb3dae8b79cda19e3e4f8ffb5e8de4f18df93c95"
+checksum = "c917123afa01924fc84bb20c4c03f004d9c38e5127e3c039bbf7f4b9c76a2f6b"
 
 [[package]]
 name = "pin-utils"
@@ -1432,15 +1476,15 @@ checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
 [[package]]
 name = "pkg-config"
-version = "0.3.18"
+version = "0.3.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d36492546b6af1463394d46f0c834346f31548646f6ba10849802c9c9a27ac33"
+checksum = "3831453b3449ceb48b6d9c7ad7c96d5ea673e9b470a1dc578c2ce6521230884c"
 
 [[package]]
 name = "ppv-lite86"
-version = "0.2.9"
+version = "0.2.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c36fa947111f5c62a733b652544dd0016a43ce89619538a8ef92724a6f501a20"
+checksum = "ac74c624d6b2d21f425f752262f42188365d7b8ff1aff74c82e45136510a4857"
 
 [[package]]
 name = "pretty_env_logger"
@@ -1456,9 +1500,9 @@ dependencies = [
 
 [[package]]
 name = "proc-macro-hack"
-version = "0.5.18"
+version = "0.5.19"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "99c605b9a0adc77b7211c6b1f722dcb613d68d66859a44f3d485a6da332b0598"
+checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
 
 [[package]]
 name = "proc-macro-nested"
@@ -1539,9 +1583,9 @@ checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
 
 [[package]]
 name = "regex"
-version = "1.3.9"
+version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c3780fcf44b193bc4d09f36d2a3c87b251da4a046c87795a0d35f4f927ad8e6"
+checksum = "38cf2c13ed4745de91a5eb834e11c00bcc3709e773173b2ce4c56c9fbde04b9c"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1551,9 +1595,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.6.18"
+version = "0.6.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "26412eb97c6b088a6997e05f69403a802a92d520de2f8e63c2b65f9e0f47c4e8"
+checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
 
 [[package]]
 name = "remove_dir_all"
@@ -1566,9 +1610,9 @@ dependencies = [
 
 [[package]]
 name = "resolv-conf"
-version = "0.6.3"
+version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11834e137f3b14e309437a8276714eed3a80d1ef894869e510f2c0c0b98b9f4a"
+checksum = "52e44394d2086d010551b14b53b1f24e31647570cd1deb0379e2c21b329aba00"
 dependencies = [
  "hostname",
  "quick-error",
@@ -1582,9 +1626,9 @@ checksum = "ac66e816614e124a692b6ac1b8437237a518c9155a3aacab83a373982630c715"
 
 [[package]]
 name = "rustc-demangle"
-version = "0.1.17"
+version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2610b7f643d18c87dff3b489950269617e6601a51f1f05aa5daefee36f64f0b"
+checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
 
 [[package]]
 name = "rustc-hash"
@@ -1636,18 +1680,18 @@ checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
 
 [[package]]
 name = "serde"
-version = "1.0.116"
+version = "1.0.117"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96fe57af81d28386a513cbc6858332abc6117cfdb5999647c6444b8f43a370a5"
+checksum = "b88fa983de7720629c9387e9f517353ed404164b1e482c970a90c1a4aaf7dc1a"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.116"
+version = "1.0.117"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f630a6370fd8e457873b4bd2ffdae75408bc291ba72be773772a4c2a065d9ae8"
+checksum = "cbd1ae72adb44aab48f325a02444a5fc079349a8d804c1fc922aed3f7454c74e"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1656,9 +1700,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.58"
+version = "1.0.59"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a230ea9107ca2220eea9d46de97eddcb04cd00e92d13dda78e478dd33fa82bd4"
+checksum = "dcac07dbffa1c65e7f816ab9eba78eb142c6d44410f4eeba1e26e4f5dfa56b95"
 dependencies = [
  "itoa",
  "ryu",
@@ -1679,12 +1723,12 @@ dependencies = [
 
 [[package]]
 name = "sha-1"
-version = "0.9.1"
+version = "0.9.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "170a36ea86c864a3f16dd2687712dd6646f7019f301e57537c7f4dc9f5916770"
+checksum = "ce3cdf1b5e620a498ee6f2a171885ac7e22f0e12089ec4b3d22b84921792507c"
 dependencies = [
  "block-buffer",
- "cfg-if 0.1.10",
+ "cfg-if 1.0.0",
  "cpuid-bool",
  "digest",
  "opaque-debug",
@@ -1704,11 +1748,10 @@ checksum = "7fdf1b9db47230893d76faad238fd6097fd6d6a9245cd7a4d90dbd639536bbd2"
 
 [[package]]
 name = "signal-hook-registry"
-version = "1.2.1"
+version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a3e12110bc539e657a646068aaf5eb5b63af9d0c1f7b29c97113fad80e15f035"
+checksum = "ce32ea0c6c56d5eacaeb814fbed9960547021d3edd010ded1425f180536b20ab"
 dependencies = [
- "arc-swap",
  "libc",
 ]
 
@@ -1720,15 +1763,15 @@ checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
 
 [[package]]
 name = "smallvec"
-version = "1.4.2"
+version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fbee7696b84bbf3d89a1c2eccff0850e3047ed46bfcd2e92c29a2d074d57e252"
+checksum = "7acad6f34eb9e8a259d3283d1e8c1d34d7415943d4895f65cc73813c7396fc85"
 
 [[package]]
 name = "socket2"
-version = "0.3.15"
+version = "0.3.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1fa70dc5c8104ec096f4fe7ede7a221d35ae13dcd19ba1ad9a81d2cab9a1c44"
+checksum = "7fd8b795c389288baa5f355489c65e71fd48a02104600d15c4cfbc561e9e429d"
 dependencies = [
  "cfg-if 0.1.10",
  "libc",
@@ -1744,9 +1787,9 @@ checksum = "a8f112729512f8e442d81f95a8a7ddf2b7c6b8a1a6f509a95864142b30cab2d3"
 
 [[package]]
 name = "standback"
-version = "0.2.11"
+version = "0.2.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f4e0831040d2cf2bdfd51b844be71885783d489898a192f254ae25d57cce725c"
+checksum = "cf906c8b8fc3f6ecd1046e01da1d8ddec83e48c8b08b84dcc02b585a6bedf5a8"
 dependencies = [
  "version_check",
 ]
@@ -1808,9 +1851,9 @@ checksum = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 
 [[package]]
 name = "syn"
-version = "1.0.42"
+version = "1.0.48"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9c51d92969d209b54a98397e1b91c8ae82d8c87a7bb87df0b29aa2ad81454228"
+checksum = "cc371affeffc477f42a221a1e4297aedcea33d47d19b61455588bd9d8f6b19ac"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1845,9 +1888,9 @@ dependencies = [
 
 [[package]]
 name = "termcolor"
-version = "1.1.0"
+version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb6bfa289a4d7c5766392812c0a1f4c1ba45afa1ad47803c11e1f407d846d75f"
+checksum = "bf11676eb135389f21fcda654382c4859bbfc1d2f36e4425a2f829bb41b1e20e"
 dependencies = [
  "winapi-util",
 ]
@@ -1863,18 +1906,18 @@ dependencies = [
 
 [[package]]
 name = "thiserror"
-version = "1.0.21"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "318234ffa22e0920fe9a40d7b8369b5f649d490980cf7aadcf1eb91594869b42"
+checksum = "0e9ae34b84616eedaaf1e9dd6026dbe00dcafa92aa0c8077cb69df1fcfe5e53e"
 dependencies = [
  "thiserror-impl",
 ]
 
 [[package]]
 name = "thiserror-impl"
-version = "1.0.21"
+version = "1.0.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cae2447b6282786c3493999f40a9be2a6ad20cb8bd268b0a0dbf5a065535c0ab"
+checksum = "9ba20f23e85b10754cd195504aebf6a27e2e6cbe28c17778a0c930724628dd56"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1912,9 +1955,9 @@ dependencies = [
 
 [[package]]
 name = "time"
-version = "0.2.22"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "55b7151c9065e80917fbf285d9a5d1432f60db41d170ccafc749a136b41a93af"
+checksum = "bcdaeea317915d59b2b4cd3b5efcd156c309108664277793f5351700c02ce98b"
 dependencies = [
  "const_fn",
  "libc",
@@ -1948,12 +1991,6 @@ dependencies = [
  "syn",
 ]
 
-[[package]]
-name = "tinyvec"
-version = "0.3.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "238ce071d267c5710f9d31451efec16c5ee22de34df17cc05e56cbc92e967117"
-
 [[package]]
 name = "tinyvec"
 version = "1.0.1"
@@ -1971,9 +2008,9 @@ checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
 
 [[package]]
 name = "tokio"
-version = "0.2.22"
+version = "0.2.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d34ca54d84bf2b5b4d7d31e901a8464f7b60ac145a284fba25ceb801f2ddccd"
+checksum = "a6d7ad61edd59bfcc7e80dababf0f4aed2e6d5e0ba1659356ae889752dfc12ff"
 dependencies = [
  "bytes 0.5.6",
  "fnv",
@@ -2000,15 +2037,15 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "57fc868aae093479e3131e3d165c93b1c7474109d13c90ec0dda2a1bbfff0674"
 dependencies = [
  "bytes 0.4.12",
- "futures 0.1.29",
+ "futures 0.1.30",
  "log",
 ]
 
 [[package]]
 name = "tokio-macros"
-version = "0.2.5"
+version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f0c3acc6aa564495a0f2e1d59fab677cd7f81a19994cfc7f3ad0e64301560389"
+checksum = "e44da00bfc73a25f814cd8d7e57a68a5c31b74b3152a0a1d1f590c97ed06265a"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -2029,6 +2066,12 @@ dependencies = [
  "tokio",
 ]
 
+[[package]]
+name = "toml"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "736b60249cb25337bc196faa43ee12c705e426f3d55c214d73a4e7be06f92cb4"
+
 [[package]]
 name = "tracing"
 version = "0.1.21"
@@ -2050,16 +2093,26 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "tracing-futures"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab7bb6f14721aa00656086e9335d363c5c8747bae02ebe32ea2c7dece5689b4c"
+dependencies = [
+ "pin-project 0.4.27",
+ "tracing",
+]
+
 [[package]]
 name = "trust-dns-proto"
-version = "0.19.5"
+version = "0.19.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cdd7061ba6f4d4d9721afedffbfd403f20f39a4301fee1b70d6fcd09cca69f28"
+checksum = "53861fcb288a166aae4c508ae558ed18b53838db728d4d310aad08270a7d4c2b"
 dependencies = [
  "async-trait",
  "backtrace",
  "enum-as-inner",
- "futures 0.3.6",
+ "futures 0.3.8",
  "idna",
  "lazy_static",
  "log",
@@ -2072,13 +2125,13 @@ dependencies = [
 
 [[package]]
 name = "trust-dns-resolver"
-version = "0.19.5"
+version = "0.19.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0f23cdfdc3d8300b3c50c9e84302d3bd6d860fb9529af84ace6cf9665f181b77"
+checksum = "6759e8efc40465547b0dfce9500d733c65f969a4cbbfbe3ccf68daaa46ef179e"
 dependencies = [
  "backtrace",
  "cfg-if 0.1.10",
- "futures 0.3.6",
+ "futures 0.3.8",
  "ipconfig",
  "lazy_static",
  "log",
@@ -2127,18 +2180,18 @@ dependencies = [
 
 [[package]]
 name = "unicode-normalization"
-version = "0.1.13"
+version = "0.1.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6fb19cf769fa8c6a80a162df694621ebeb4dafb606470b2b2fce0be40a98a977"
+checksum = "f1e9a0b71dba18b6fa17c7b3dcf1440bb3522552deb2f84bf47dabd9fb7e5570"
 dependencies = [
- "tinyvec 0.3.4",
+ "tinyvec",
 ]
 
 [[package]]
 name = "unicode-segmentation"
-version = "1.6.0"
+version = "1.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e83e153d1053cbb5a118eeff7fd5be06ed99153f00dbcd8ae310c5fb2b22edc0"
+checksum = "db8716a166f290ff49dabc18b44aa407cb7c6dbe1aa0971b44b8a24b0ca35aae"
 
 [[package]]
 name = "unicode-width"
@@ -2154,10 +2207,11 @@ checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
 
 [[package]]
 name = "url"
-version = "2.1.1"
+version = "2.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "829d4a8476c35c9bf0bbce5a3b23f4106f79728039b726d292bb93bc106787cb"
+checksum = "5909f2b0817350449ed73e8bcd81c8c3c8d9a7a5d8acba4b27db277f1868976e"
 dependencies = [
+ "form_urlencoded",
  "idna",
  "matches",
  "percent-encoding",
@@ -2344,3 +2398,25 @@ dependencies = [
  "syn",
  "synstructure",
 ]
+
+[[package]]
+name = "zmq"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aad98a7a617d608cd9e1127147f630d24af07c7cd95ba1533246d96cbdd76c66"
+dependencies = [
+ "bitflags",
+ "libc",
+ "log",
+ "zmq-sys",
+]
+
+[[package]]
+name = "zmq-sys"
+version = "0.11.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d33a2c51dde24d5b451a2ed4b488266df221a5eaee2ee519933dc46b9a9b3648"
+dependencies = [
+ "libc",
+ "metadeps",
+]
diff --git a/Cargo.toml b/Cargo.toml
index 59069e12..44fc2cd1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -27,3 +27,4 @@ tokio = {version = "0.2", features = ["full"]}
 tokio-io = "0.1"
 tss-esapi = "4.0.10-alpha.2"
 thiserror = "1.0"
+zmq = "0.9.2"
diff --git a/src/crypto.rs b/src/crypto.rs
index 1fb7151b..0f0e260a 100644
--- a/src/crypto.rs
+++ b/src/crypto.rs
@@ -3,7 +3,7 @@ use openssl::hash::MessageDigest;
 use openssl::pkcs5;
 use openssl::pkey::{PKey, Private, Public};
 use openssl::rsa::{Padding, Rsa};
-use openssl::sign::Signer;
+use openssl::sign::{Signer, Verifier};
 use std::fs::File;
 use std::io::Read;
 use std::string::String;
@@ -123,12 +123,28 @@ fn to_hex_string(bytes: Vec<u8>) -> String {
     strs.join("")
 }
 
+/*
+ * Input: Local rsa cert, and remote message and signature
+ * Output: true if they are verified, otherwise false
+ *
+ * Verify a remote message and signature against a local rsa cert
+ */
+pub(crate) fn rsa_verify(
+    rsa_key: Rsa<Public>,
+    message: &str,
+    signature: &str,
+) -> Result<bool> {
+    let keypair = PKey::from_rsa(rsa_key)?;
+    let mut verifier = Verifier::new(MessageDigest::sha256(), &keypair)?;
+    verifier.update(message.as_bytes())?;
+    Ok(verifier.verify(&signature.as_bytes())?)
+}
+
 // Unit Testing
 #[cfg(test)]
 mod tests {
     use super::*;
     use openssl::rsa::Rsa;
-    use openssl::sign::Verifier;
 
     // compare with the result from python output
     #[test]
diff --git a/src/error.rs b/src/error.rs
index c4303c45..92f471f9 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -32,6 +32,8 @@ pub(crate) enum Error {
     NumParse(std::num::ParseIntError),
     #[error("Crypto error: {0}")]
     OpenSSL(openssl::error::ErrorStack),
+    #[error("ZMQ error: {0}")]
+    ZMQ(zmq::Error),
 }
 
 impl From<tss_esapi::Error> for Error {
@@ -82,4 +84,10 @@ impl From<openssl::error::ErrorStack> for Error {
     }
 }
 
+impl From<zmq::Error> for Error {
+    fn from(err: zmq::Error) -> Self {
+        Error::ZMQ(err)
+    }
+}
+
 pub(crate) type Result<T> = std::result::Result<T, Error>;
diff --git a/src/main.rs b/src/main.rs
index 193109fe..220f89a8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -42,6 +42,7 @@ mod error;
 mod hash;
 mod keys_handler;
 mod quotes_handler;
+mod revocation;
 mod secure_mount;
 mod tpm;
 
@@ -95,11 +96,7 @@ async fn main() -> Result<()> {
     .run()
     .map_err(|x| x.into());
     info!("Listening on http://{}:{}", cloudagent_ip, cloudagent_port);
-    try_join!(actix_server, run_revocation_service())?;
-    Ok(())
-}
-
-async fn run_revocation_service() -> Result<()> {
+    try_join!(actix_server, revocation::run_revocation_service())?;
     Ok(())
 }
 
diff --git a/src/revocation.rs b/src/revocation.rs
new file mode 100644
index 00000000..2da79f72
--- /dev/null
+++ b/src/revocation.rs
@@ -0,0 +1,130 @@
+#[macro_use]
+use log::*;
+
+use crate::common::config_get;
+use crate::crypto;
+use crate::error;
+use crate::error::{Error, Result};
+use crate::secure_mount;
+
+use std::path::Path;
+
+use serde_json::Value;
+
+/// Handles revocation messages via 0mq
+/// See:
+/// - URL: https://github.com/keylime/keylime/blob/master/keylime/revocation_notifier.py
+///   Function: await_notifications
+pub(crate) async fn run_revocation_service() -> Result<()> {
+    let mount = secure_mount::mount()?;
+    let revocation_cert_path =
+        format!("{}/unzipped/RevocationNotifier-cert.crt", mount);
+
+    // Connect to the service via 0mq
+    let context = zmq::Context::new();
+    let mysock = context.socket(zmq::SUB)?;
+
+    mysock.set_subscribe(b"")?;
+
+    let revocation_ip =
+        config_get("/etc/keylime.conf", "general", "receive_revocation_ip")?;
+    let revocation_port = config_get(
+        "/etc/keylime.conf",
+        "general",
+        "receive_revocation_port",
+    )?;
+    let endpoint = format!("{}:{}", revocation_ip, revocation_port);
+
+    mysock.connect(endpoint.as_str())?;
+
+    // Unlike the python agent we do not attempt lazy loading. We either
+    // have the certificate, or we don't. If we don't have a key or can't load
+    // the key we return a Configuration error as the service will not work.
+    let cert_key = if Path::new(&revocation_cert_path).exists() {
+        info!(
+            "Loading the revocation certificate from {}",
+            revocation_cert_path
+        );
+        match crypto::rsa_import_pubkey(revocation_cert_path) {
+            Ok(v) => v,
+            Err(e) => {
+                return Err(error::Error::Configuration(String::from(
+                    "Can not load pubkey",
+                )))
+            }
+        }
+    } else {
+        error!("Path for the 0mq socket socket doesn't exist");
+        return Err(error::Error::Configuration(String::from(
+            "Path for the 0mq socket socket doesn't exist",
+        )));
+    };
+
+    info!("Waiting for revocation messages on 0mq {}", endpoint);
+
+    // Main revocation service loop. If a message is malformed or
+    // can not be verified the loop continues.
+    loop {
+        let mut rawbody = match mysock.recv_string(0) {
+            Ok(v) => match v {
+                Ok(v) => v,
+                _ => {
+                    warn!("Unable to read message from 0mq");
+                    continue;
+                }
+            },
+            Err(e) => {
+                warn!("Unable to read message from 0mq");
+                continue;
+            }
+        };
+
+        let body: Value = serde_json::from_str(rawbody.as_str())?;
+
+        // Ensure we have a signature, otherwise continue the loop
+        let signature = match body["signature"].as_str() {
+            Some(v) => v,
+            _ => {
+                warn!("No signature on revocation message from server");
+                continue;
+            }
+        };
+
+        // Ensure we have a msg, otherwise continue the loop
+        let message = match body["msg"].as_str() {
+            Some(v) => v,
+            _ => {
+                warn!("No msg on revocation message from server");
+                continue;
+            }
+        };
+
+        // Verify the message and signature with our key
+        let mut verified =
+            crypto::rsa_verify(cert_key.clone(), message, signature);
+
+        match verified {
+            Ok(true) => {
+                let msg = body["msg"].as_str();
+                let msg_payload: Value =
+                    serde_json::from_str(match msg.as_deref() {
+                        Some(v) => v,
+                        _ => {
+                            warn!("Unable to decode json in msg");
+                            continue;
+                        }
+                    })?;
+                debug!(
+                    "Revocation signature validated for revocation: {}",
+                    msg_payload
+                );
+                // TODO: Implement callback
+                //callback(msg_payload)
+            }
+            _ => {
+                error!("Invalid revocation message siganture {}", body);
+            }
+        }
+    }
+    Ok(())
+}
diff --git a/tests/Dockerfile b/tests/Dockerfile
index bc802b26..50608382 100644
--- a/tests/Dockerfile
+++ b/tests/Dockerfile
@@ -5,4 +5,4 @@ RUN dnf install -y \
 	swtpm swtpm-tools \
 	rust clippy cargo \
 	llvm llvm-devel clang pkg-config \
-	dbus-daemon
+	dbus-daemon czmq-devel