ETSI TS 155 226-2017 数字蜂窝通信系统(第2+阶段)(GSM全球移动通信系统);3G安全性;GSM和ECSD(增强型电路交换数据)的A5/4加密算法的规格;以及GPRS(通用分组无线业务)的GEA4加密算法(V14.0.0;3GPP TS 55.226 版本14.0.0 发行版本14)
Digital cellular telecommunications system (Phase 2+) (GSM); 3G Security; Specification of the A5/4 Encryption Algorithms for GSM and ECSD@ and the GEA4 Encryption Algorithm for GPRS (V14.0.0; 3GPP TS 55.226 version 14.0.0 Release 14)