diff --git a/src/main/java/com/licel/jcardsim/crypto/ECKeyImpl.java b/src/main/java/com/licel/jcardsim/crypto/ECKeyImpl.java
index 206d00bb..29678594 100644
--- a/src/main/java/com/licel/jcardsim/crypto/ECKeyImpl.java
+++ b/src/main/java/com/licel/jcardsim/crypto/ECKeyImpl.java
@@ -60,7 +60,11 @@ public abstract class ECKeyImpl extends KeyImpl implements ECKey {
     public ECKeyImpl(byte keyType, short keySize) {
         this.size = keySize;
         this.type = keyType;
-        setDomainParameters(getDefaultsDomainParameters(type, size));
+        try {
+            setDomainParameters(getDefaultsDomainParameters(type, size));
+        } catch (CryptoException e) {
+            clearKeyInternal();
+        }
     }
 
     /**
@@ -79,18 +83,23 @@ public ECKeyImpl(ECKeyParameters parameters) {
         setDomainParameters(parameters.getParameters());
     }
 
-    public void clearKey() {
+    private void clearKeyInternal() {
         a.clear();
         b.clear();
         g.clear();
         r.clear();
         fp.clear();
         k = 0;
+        isKInitialized = false;
         e1 = 0;
         e2 = 0;
         e3 = 0;
     }
 
+    public void clearKey() {
+        clearKeyInternal();
+    }
+
     protected boolean isDomainParametersInitialized() {
         return (a.isInitialized() && b.isInitialized() && g.isInitialized() && r.isInitialized()
                 && isKInitialized && (fp.isInitialized() || k != 0));