[Resource Topic] 2012/606: Quantum-Secure Message Authentication Codes

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Title:
Quantum-Secure Message Authentication Codes

Authors: Dan Boneh, Mark Zhandry

Abstract:

We construct the first Message Authentication Codes (MACs) that are existentially unforgeable against a quantum chosen message attack. These chosen message attacks model a quantum adversary’s ability to obtain the MAC on a superposition of messages of its choice. We begin by showing that a quantum secure PRF is sufficient for constructing a quantum secure MAC, a fact that is considerably harder to prove than its classical analogue. Next, we show that a variant of Carter-Wegman MACs can be proven to be quantum secure. Unlike the classical settings, we present an attack showing that a pair-wise independent hash family is insufficient to construct a quantum secure one-time MAC, but we prove that a four-wise independent family is sufficient for one-time security.

ePrint: https://eprint.iacr.org/2012/606

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