Paper Info
Title
Provably Secure Timed-Release Public Key Encryption
Abstract
A timed-release cryptosystem allows a sender to encrypt a message so that only the intended recipient can read it only after a specified time. We formalize the concept of a secure timed-release public-key cryptosystem and show that, if a third party is relied upon to guarantee decryption after the specified date, this concept is equivalent to identity-based encryption; this explains the observation that all known constructions use identity-based encryption to achieve timed-release security. We then give several provably-secure constructions of timed-release encryption: a generic scheme based on any identity-based encryption scheme, and two more efficient schemes based on the existence of cryptographically admissible bilinear mappings. The first of these is essentially as efficient as the Boneh-Franklin Identity-Based encryption scheme, and is provably secure and authenticated in the random oracle model; the final scheme is not authenticated but is provably secure in the standard model (i.e., without random oracles).
Year
DOI
Venue
2008
10.1145/1330332.1330336
ACM Trans. Inf. Syst. Secur.
Keywords
DocType
Volume
authenticated encryption,efficient scheme,Provably Secure Timed-Release Public,generic scheme,key-insulated encryption,identity-based encryption scheme,final scheme,Key Encryption,timed-release,secure timed-release public-key cryptosystem,identity-based encryption,encryption scheme,timed-release cryptosystem,timed-release encryption,timed-release security
Journal
11
Issue
ISSN
Citations 
2
1094-9224
28
PageRank 
References 
Authors
0.92
35
4
Name
Order
Citations
PageRank
Jung Hee Cheon11787129.74
Nicholas Hopper2146995.76
Yongdae Kim31944125.44
Ivan Osipkov426213.70