diff --git a/COPYRIGHT b/COPYRIGHT
index 8407a0a13f113165b1c85f0ffeaae85f5d5453e6..3190a9ea32ec2f049105d259696cba6ed048767c 100644
--- a/COPYRIGHT
+++ b/COPYRIGHT
@@ -12,9 +12,6 @@ created from the same source code. Parts of other
 copyrighted works are included in Pike, in accordance
 with their respective conditions for distribution.
 
-DES encryption and decryption code
-Copyright � 1992 Dana L. How
-
 Emacs font lock definitions
 Copyright � 2002 Martin Stjernholm
 
@@ -30,12 +27,6 @@ Copyright 
 Regular expression matching code
 Copyright � 1986 by University of Toronto.
 
-Rijndael encryption and decryption code
-Copyright � 2000 Joan Daemen
-
-Secure Hash Algorithm code
-Copyright � 1995, A.M. Kuchling
-
 TrueVision Targa code
 Copyright � 1997 Raphael FRANCOIS and Gordon Matzigkeit