[Resource Topic] 2019/1017: The Local Forking Lemma and its Application to Deterministic Encryption

Welcome to the resource topic for 2019/1017

Title:
The Local Forking Lemma and its Application to Deterministic Encryption

Authors: Mihir Bellare, Wei Dai, Lucy Li

Abstract:

We bypass impossibility results for the deterministic encryption of public-key-dependent messages, showing that, in this setting, the classical Encrypt-with-Hash scheme provides message-recovery security, across a broad range of message distributions. The proof relies on a new variant of the forking lemma in which the random oracle is reprogrammed on just a single fork point rather than on all points past the fork.

ePrint: https://eprint.iacr.org/2019/1017

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