关键词: 5G, 密码算法, 抗量子计算密码, 安全流程, 实现性能

Abstract: In 5G Release 15 and Release 16, 128-bit symmetric algorithms and Elliptic curve asymmetric algorithms are standardized to protect air-interface information. Due to development of quantum computing technology, quantum computers may pose a long-term threat to 5G system. 3GPP have completed a study item and reached an agreement that it is necessary to use 256-bit algorithms, as well as quantum-resistance asymmetric algorithms in future release of 5G. In this paper, we gave an overview of the secure algorithms in 5G system. We analyzed effect on communication procedures and implementations when 256-bit symmetric and quantum-resistance asymmetric algorithms coexist with 128-bit keys in legacy networks or earlier 5G phases, which provide important reference for the development of 5G network in the future. future.

Key words: 5G, secure algorithms, quantum-resistance asymmetric algorithms, communication procedures, performance