Split counters with dynamic epoch tracking for cryptographic protection of secure data

Abstract

Aspects and implementations include systems and techniques for efficient protection of secret data against replay attacks, including updating a unit of data of a plurality of units of data, updating an individual portion of a counter for the unit of data, the counter including an individual portion and a common portion, accessing a pointer value that distinguishes counters corresponding to a first epoch from counters corresponding to a second epoch, selecting, based on at least the pointer value and a value of the individual portion of the counter, an update value, and modifying the pointer value using the update value.

CPC Classifications