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Title:
Hybrid WBC: Secure and Efficient White-Box Encryption Schemes
Authors: Jihoon Cho, Kyu Young Choi, Orr Dunkelman, Nathan Keller, Dukjae Moon, Aviya Vaidberg
Abstract:White-box cryptography aims at providing security against an adversary that has access to the encryption process. Numerous white-box encryption schemes were proposed since the introduction of white-box cryptography by Chow et al. in 2002. However, most of them are slow, and thus, can be used in practice only to protect very small amounts of information, such as encryption keys. In this paper we present a new threat model for white-box cryptography which corresponds to the practical abilities of the adversary in a wide range of applications. Furthermore, we study design criteria for white-box primitives that are important from the industry point of view. Finally, we propose a class of new primitives that combine a white-box algorithm with a standard block cipher to obtain white-box protection for encrypting long messages, with high security and reasonable performance.
ePrint: https://eprint.iacr.org/2016/679
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