As far as cheap encryption, look at Whit's reference. ---------- Forwarded message ---------- From: Whitfield Diffie <whitfield.diffie@gmail.com> Date: Wed, Jun 26, 2013 at 3:46 PM Subject: [math-fun] Always off topic; always on target To: math-fun <math-fun@mailman.xmission.com> NSA has posted a paper on lightweight block ciphers at: http://eprint.iacr.org/2013/404.pdf Whit _______________________________________________ math-fun mailing list math-fun@mailman.xmission.com http://mailman.xmission.com/cgi-bin/mailman/listinfo/math-fun