diff --git a/src/main/java/com/licel/jcardsim/crypto/SecureRandomNullProvider.java b/src/main/java/com/licel/jcardsim/crypto/SecureRandomNullProvider.java
index f4cca44..70d41a3 100644
--- a/src/main/java/com/licel/jcardsim/crypto/SecureRandomNullProvider.java
+++ b/src/main/java/com/licel/jcardsim/crypto/SecureRandomNullProvider.java
@@ -32,7 +32,14 @@ class SecureRandomNullProvider extends SecureRandom {
             }
             @Override
             protected void engineNextBytes(byte[] arg) {
-                engine.nextBytes(arg);
+                final String doSecureRandom = System.getProperty("com.licel.jcardsim.randomdata.secure", "0");
+                if ("1".equals(doSecureRandom)){
+                    SecureRandom randomGenerator = new SecureRandom();
+                    randomGenerator.nextBytes(arg);
+                }
+		else{
+                    engine.nextBytes(arg);
+		}
             }
             @Override
             protected byte[] engineGenerateSeed(int len) {