Adi Shamir has provided "Real Time Cryptanalysis of A5/1 on a PC," an 18-page paper by Alex Biryukov, Adi Shamir and David Wagner presented at the Fast Encryption Software Workshop in New York City on April 10. It is an updated version of the December 1999 preliminary draft by Biryukov and Shamir. HTML: http://cryptome.org/a51-bsw.htm (text, 55K; 6 images, 156K) Original Postscript: http://cryptome.org/a5.ps (297K) Zipped Postscript: http://cryptome.or/a5.zip (104K)