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A Masked White-Box Cryptographic Implementation for Protecting Against Differential Computation Analysis
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- Authors
- Seungkwang Lee, Taesung Kim, Yousung Kang
- Issue Date
- 2018-10
- Citation
- IEEE Transactions on Information Forensics and Security, v.13, no.10, pp.2602-2615
- ISSN
- 1556-6013
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Project Code
- 18HH1300, Study on secure key hiding technology for IoT devices, Yousung Kang
- Abstract
- Recently, gray-box attacks on white-box cryptographic implementations have succeeded. These attacks are more efficient than white-box attacks because they can be performed without detailed knowledge of the target implementation. The success of the gray-box attack is reportedly due to the unbalanced encodings used to generate the white-box lookup table. In this paper, we propose a method to protect the gray-box attack against white-box implementations. The basic idea is to apply the masking technique before encoding intermediate values during the white-box lookup table generation. Because we do not require any random source in runtime, it is possible to perform efficient encryption and decryption using our method. The security and performance analysis shows that the proposed method can be a reliable and efficient countermeasure.
- KSP Keywords
- Computation analysis, Intermediate values, Performance analysis, Random source, encryption and decryption, look-up table, masking technique, white-box