diff --git a/crypto/gf128mul.c b/crypto/gf128mul.c
index ecbeaa1f17e..a90d260528d 100644
--- a/crypto/gf128mul.c
+++ b/crypto/gf128mul.c
@@ -4,7 +4,7 @@
  * Copyright (c) 2006, Rik Snel <rsnel@cube.dyndns.org>
  *
  * Based on Dr Brian Gladman's (GPL'd) work published at
- * http://fp.gladman.plus.com/cryptography_technology/index.htm
+ * http://gladman.plushost.co.uk/oldsite/cryptography_technology/index.php
  * See the original copyright notice below.
  *
  * This program is free software; you can redistribute it and/or modify it
diff --git a/crypto/sha256_generic.c b/crypto/sha256_generic.c
index caa3542e6ce..6349d8339d3 100644
--- a/crypto/sha256_generic.c
+++ b/crypto/sha256_generic.c
@@ -2,7 +2,7 @@
  * Cryptographic API.
  *
  * SHA-256, as specified in
- * http://csrc.nist.gov/cryptval/shs/sha256-384-512.pdf
+ * http://csrc.nist.gov/groups/STM/cavp/documents/shs/sha256-384-512.pdf
  *
  * SHA-256 code by Jean-Luc Cooke <jlcooke@certainkey.com>.
  *