diff --git a/src/main/java/com/josh/vku2f/OpCode.java b/src/main/java/com/josh/vku2f/OpCode.java
new file mode 100644
index 0000000000000000000000000000000000000000..24a98f33197cbedb0b40c8b2587c246432fceece
--- /dev/null
+++ b/src/main/java/com/josh/vku2f/OpCode.java
@@ -0,0 +1,8 @@
+package com.josh.vku2f;
+
+public class OpCode {
+	public static final byte[] Bytes_GET_IDENTITY_CREDENTIAL //CRC-32("GETIDCREDENTIAL")=ac313cf5
+			= new byte[]{'a', 'c', '3', '1', '3', 'c', 'f', '5'};
+	public static byte GET_IDENTITY_CREDENTIAL = (short) 1;
+	public static byte NONE = (short) 0;
+}