상세정보
학술지
Conditional Re-encoding Method for Cryptanalysis-Resistant White-Box AES
- 발행일
- 201510
- 출처
- ETRI Journal, v.37 no.5, pp.1012-1022
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 초록
- Conventional cryptographic algorithms are not sufficient to protect secret keys and data in white-box environments, where an attacker has full visibility and control over an executing software code. For this reason, cryptographic algorithms have been redesigned to be resistant to white-box attacks. The first white-box AES (WB-AES) implementation was thought to provide reliable security in that all brute force attacks are infeasible even in white-box environments; however, this proved not to be the case. In particular, Billet and others presented a cryptanalysis of WB-AES with 230 time complexity, and Michiels and others generalized it for all substitution-linear transformation ciphers. Recently, a collision-based cryptanalysis was also reported. In this paper, we revisit Chow and others's first WB-AES implementation and present a conditional re-encoding method for cryptanalysis protection. The experimental results show that there is approximately a 57% increase in the memory requirement and a 20% increase in execution speed.
- KSP 제안 키워드
- AES implementation, Brute-force attack, Cryptographic Algorithms, Encoding method, Execution speed, Linear transformation, Time Complexity, secret key, software code, white-box