32-Bit RISC-V상에서의 LEA 경량 블록 암호 GCM 운용 모드 구현 = Implementation of LEA Lightwegiht Block Cipher GCM Operation Mode on 32-Bit RISC-V

다국어 초록 (Multilingual Abstract)

LEA is a lightweight block cipher developed in Korea in 2013. In this paper, among block cipher operation methods, CTR operation mode and GCM operation mode that provides confidentiality and integrity are implemented. In the LEA-CTR operation mode, we propose an optimization implementation that omits the operation between states through the state fixation and omits the operation through the pre-operation by utilizing the characteristics of the fixed nonce value of the CTR operation mode. It also shows that the proposed method is applicable to the GCM operation mode, and implements the GCM through the implementation of the GHASH function using the Galois Field(2¹²⁸) multiplication operation. As a result, in the case of LEA-CTR to which the proposed technique is applied on 32-bit RISC-V, it was confirmed that the performance was improved by 2% compared to the previous study. In addition, the performance of the GCM operation mode is presented so that it can be used as a performance indicator in other studies in the future.

참고문헌 (Reference)

1 A. Waterman, "The risc-v instruction set manual, volume i: Baseuser-level isa" UCBerkeley 2011

2 A.Waterman, "The RISC-V Instruction Set Manual Volume I: User-Level ISA Document Version 2.2"

3 D. McGrew, "The Galois/counter mode of operation (GCM)" 20 : 0278-0070, 2005

4 NIST, "Lightweight Cryptography:Project Overview"

5 D.J Hong, "LEA: A 128-Bit Block Cipher for Fast Encryption on Common Processors" 8267 : 3-27, 2013

6 ISO, "ISO/IEC 29192-2:2019 Information Security-Lightweight Cryptography-Part 2: Block Ciphers"

7 Jin-Gyo Song, "Efficient Parallel Implementation of CTR Mode of ARX-Based Block Ciphers on ARMv8 Microcontrollers" 11 (11): 2548-, 2021

8 Young-Beom Kim, "Efficient Implementation of ARX-Based Block Ciphers on 8-bit AVR Microcontrollers" 8 (8): 1837-, 2020

9 H. Lipmaa, "CTR-mode encryption" 39 : 2000

10 곽유진 ; 김영범 ; 서석충, "32-bit RISC-V 프로세서에서 국산 블록 암호 성능 밴치마킹" 한국정보보호학회 31 (31): 331-340, 2021