[Resource Topic] 2021/589: White-Box Encryption Scheme Using a Quantum Memory

Welcome to the resource topic for 2021/589

Title:
White-Box Encryption Scheme Using a Quantum Memory

Authors: Hidenori Kuwakado, Shoichi Hirose, Masahiro Mambo

Abstract:

White-box cryptography is often used in embedded applications. Although white-box cryptography with provable security has been proposed recently, the circuit size is much larger than that of usual block ciphers. We address this problem in a different way from previous works. In particular, we propose a white-box symmetric cipher using quantum memory. The size of our cipher is a polynomial in input-length and output-length of an underlying function. The security against classical attacks is reduced to the security of the underlying classical pseudo-random function. We show that quantum attacks using the generalized Grover algorithm to our cipher are ineffective.

ePrint: https://eprint.iacr.org/2021/589

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