diff --git a/model/ccn_random.cc b/model/ccn_random.cc
new file mode 100644
index 0000000..10912e5
--- /dev/null
+++ b/model/ccn_random.cc
@@ -0,0 +1,48 @@
+/*
+ *  ccn_random.cc
+ *  Abstraction
+ *
+ *  Created by Ilya on 7/29/11.
+ *  Copyright 2011 __MyCompanyName__. All rights reserved.
+ *
+ */
+
+#include "ccn_random.h"
+#include <openssl/rand.h>
+//#include <openssl/rand.c>
+
+/**
+ * Generate pseudo-random bytes.
+ *
+ * @param buf is the destination buffer
+ * @param size is in bytes
+ */
+void
+ccn_random_bytes(unsigned char *buf, size_t size)
+{
+  int num = size;
+  
+  if (num < 0 || num != (int)size)
+    abort();
+  RAND_bytes(buf, num);
+}
+
+/**
+ * Feed some entropy to the random number generator.
+ * 
+ * @param buf is the source buffer
+ * @param size is in bytes
+ * @param bits_of_entropy is an estimate; use 0 to make me guess
+ */
+void
+ccn_add_entropy(const void *buf, size_t size, int bits_of_entropy)
+{
+  int num = size;
+  
+  if (num < 0 || num != (int)size)
+    abort();
+  /* Supply a hopefully conservative estimate of entropy. */
+  if (bits_of_entropy <= 0)
+    bits_of_entropy = (num < 32) ? 1 : num / 32;
+  RAND_add((unsigned char *)buf, num, bits_of_entropy * 0.125);
+}