1. xemacs
  2. ecrypto

Source

ecrypto / README

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File README

  • Ignore whitespace
   this file contains the code for the IDEA cipher.  it is reasonably
   secure, in terms of cleaning up intermediate computations.  the
   functions in it operate on 16-bit vectors.  CBC and a CBC-based
-  package transform are provided.
+  package transform are provided.  XEmacs: this file was removed due
+  to supposed patent problems.
 
 md5.el, md5-old.el, sha1.el, sha1-old.el
   code for the MD5 and SHA-1 hash algorithms.  md5.el and sha1.el are