Module Name:	pkgsrc
Committed By:	agc
Date:		Fri Aug 13 10:27:46 UTC 2004

Modified Files:
	pkgsrc/doc: CHANGES

Log Message:
Initial import of hydan-0.13 into the Packages Collection.

Hydan steganographically conceals a message into an application.  It
exploits redundancy in the i386 instruction set by defining sets of
functionally equivalent instructions.  It then encodes information in
machine code by using the appropriate instructions from each set.

Features:
       - Application filesize remains unchanged
       - Message is blowfish encrypted with a user-supplied
         passphrase before being embedded
       - Encoding rate: 1/110

Primary uses for Hydan:
       - Covert Communication:  embedding data into binaries creates a
         covert channel that can be used to exchange secret messages.
       - Signing:  a program's cryptographic signature can be embedded
         into itself.  The recipient of the binary can then verify
         that it has not been tampered with (virus or trojan), and is
         really from who it claims to be from.  This check can be
         built into the OS for user transparency.
       - Watermarking:  a watermark can be embedded to uniquely
         identify binaries for copyright purposes, or as part of a DRM
         scheme.  Note:  this usage is not recommended as Hydan
         implements fragile watermarks.


To generate a diff of this commit:
cvs rdiff -r1.6862 -r1.6863 pkgsrc/doc/CHANGES

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.