Add some notes.

diff --git a/safer.h b/safer.h
index f4d5516..8432bef 100644 (file)
--- a/safer.h
+++ b/safer.h
@@ -1,6 +1,6 @@
 /* -*-c-*-
  *
- * $Id: safer.h,v 1.1 2001/04/29 17:37:35 mdw Exp $
+ * $Id: safer.h,v 1.2 2001/04/29 18:11:38 mdw Exp $
  *
  * The SAFER block cipher
  *
@@ -30,11 +30,27 @@
 /*----- Revision history --------------------------------------------------* 
  *
  * $Log: safer.h,v $
+ * Revision 1.2  2001/04/29 18:11:38  mdw
+ * Add some notes.
+ *
  * Revision 1.1  2001/04/29 17:37:35  mdw
  * Added SAFER block cipher.
  *
  */
 
+/*----- Notes on the SAFER block cipher -----------------------------------*
+ *
+ * SAFER was designed by James Massey (who also worked on IDEA) for Cylink.
+ * It's free -- patents or other silliness.  The original key schedule had
+ * some weaknesses, and a new one (the SK version) was added.  SAFER has a
+ * variable number of rounds.  The standard interface uses the recommended
+ * number for the given key schedule algorithm and key size.
+ *
+ * SAFER got a bad press in Schneier's book `Applied Cryptography'.  I think
+ * this is undeserved.  SAFER is a well-designed cipher which mostly looks
+ * pretty solid.
+ */
+
 #ifndef CATACOMB_SAFER_H
 #define CATACOMB_SAFER_H