Efficient Refreshing Protocol for Leakage-Resilient Storage Based on the Inner-Product Extractor

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Executive Summary

A recent trend in cryptography is to protect data and computation against various side-channel attacks. Dziembowski and Faust (TCC 2012) have proposed a general way to protect arbitrary circuits against any continual leakage assuming that: the memory is divided into the parts, which leaks independently the leakage in each observation is bounded and the circuit has an access to a leak-free component, which samples random orthogonal vectors. The pivotal element of their construction is a protocol for refreshing the so-called Leakage-Resilient Storage (LRS).

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