Unidirectional Key Update in Updatable Encryption, Revisited
Cryptography and Security
2026-01-14 v4
Abstract
In this paper we construct a new efficient updatable encryption (UE) scheme based on FrodoPKE learning with errors key encapsulation. We analyse the security of the proposed scheme in the backward-leak uni-directional setting within the rand-ind-eu-cpa model. Since the underlying computationally hard problem here is LWE, the scheme is secure against both classical and quantum attacks.
Keywords
Cite
@article{arxiv.2410.03948,
title = {Unidirectional Key Update in Updatable Encryption, Revisited},
author = {M. Jurkiewicz and K. Prabucka},
journal= {arXiv preprint arXiv:2410.03948},
year = {2026}
}