Paper 2004/231 Original: eprint.iacr.org/2004/231 ↗
Timed-Release and Key-Insulated Public Key Encryption
Abstract
In this paper we consider two security notions related to Identity Based Encryption: Key-insulated public key encryption, introduced by Dodis, Katz, Xu and Yung; and Timed-Release Public Key cryptography, introduced independently by May and Rivest, Shamir and Wagner. We first formalize the notion of secure timed-release public key encryption, and show that, despite several differences in its formulation, it is equivalent to strongly key-insulated public key encryption (with optimal threshold and random access key updates). Next, we introduce the concept of an authenticated timed-release cryptosystem, briefly consider generic constructions, and then give a construction based on a single primitive which is efficient and provably secure.
Metadata
- Available format(s)
PDF- Publication info
- Preprint.
- History
- 2006-07-13: last updated
- 2004-09-10: published
- Short URL
- https://ia.cr/2004/231
- License
- https://creativecommons.org/licenses/by/4.0/
BibTeX
@misc{cryptoeprint:2004/231,
author = {Jung Hee Cheon and Nicholas Hopper and Yongdae Kim and Ivan Osipkov},
title = {Timed-Release and Key-Insulated Public Key Encryption},
howpublished = {Cryptology {ePrint} Archive, Paper 2004/231},
year = {2004},
url = {https://eprint.iacr.org/2004/231}
}