Abstract
A software library in C language is created which contains a high-performance implementation of encryption algorithms used in PDCP protocol of 5G NR network. The standard set of algorithms is extended with GOST R 34.12–2015 («Kuznyechik»). Performance optimizations are done by using special extensions to x86 architecture instruction set: AES-NI и AVX. Implementation results for the two most common and secure algorithms, AES and «Kuznyechik», are presented. Their performance was evaluated including consumed clock cycles during execution. All optimizations are described and development prospects of «Kuznyechik» implementation optimizations are given.
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