поднимаем тему!!!
накопал полезный док:
"Ciphering in GPRS and UMTS
Encryption in 3G Packet Data Networks"
Revised 24th May, 2000
http://64.233.183.104/search?q=cache:shRIfklw-WkJ:www.asiantuntijat.org/~avs/gprs-umts-crypto-revised.ps.gz+gea+gprs&hl=ru&ct=clnk&cd=4&client=o pera