European Telecommunications Standards Institute (ETSI)
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ETSI TS 101 106-2001
ETSI TS 101 106-2001 history
2001ETSI TS 101 106-2001 Digital Cellular Telecommunications System (Phase 2+); General Packet Radio Service (GPRS); GPRS Ciphering Algorithm Requirements
1998ETSI TS 101 106-1998 Digital Cellular Telecommunications System (Phase 2+); General Packet Radio Service (GPRS); GPRS Ciphering Algorithm Requirements GSM 01.61 Version 6.0.1 Release 1997
1997ETSI TS 101 106-1997 Digital Cellular Telecommunications System (Phase 2+); General Packet Radio Service (GPRS); GPRS Ciphering Algorithm Requirements GSM 01.61 Version 5.0.0