Ciphering

Some articles on ciphering:

Cellular Data Communication Protocol - RR - Message Type
010 IMMEDIATE ASSIGNMENT REJECT 00110- - - Ciphering messages 101 CIPHERING MODE COMMAND 010 CIPHERING MODE COMPLETE 00101- - - Handover messages 110 ASSIGNMENT ...
Um Interface - Um Security Features - Authentication of Subscribers
... Both the MS and the network also compute a 64-bit ciphering key, Kc, from RAND and Ki using the A8 algorithm ... Both parties save this value for later use when ciphering is enabled ... always occurs in the clear, since the ciphering key is not established until after the transaction is started ...
Um Interface - Um Security Features - Um Encryption
... GSM encryption, called "ciphering" in the specifications, is implemented on the channel bits of the radio bursts, at a very low level in L1, after forward ... The GSM ciphering algorithm is called A5 ... four variants of A5 in GSM, only first three of which are widely deployed A5/0—no ciphering at all A5/1 strong(er) ciphering, intended for use in North America and Europe A5/2 ...
Universal Mobile Telecommunications System - Technology - Radio Access Network
... Security includes two procedures integrity and ciphering ... Ciphering ensures that no one listens to your data on the air interface ... Both integrity and ciphering are applied for SRBs whereas only ciphering is applied for data RBs ...