Sciweavers

Share
SCN
2008
Springer

General Certificateless Encryption and Timed-Release Encryption

9 years 9 months ago
General Certificateless Encryption and Timed-Release Encryption
While recent timed-release encryption (TRE) schemes are implicitly supported by a certificateless encryption (CLE) mechanism, the security models of CLE and TRE differ and there is no generic transformation from a CLE to a TRE. This paper gives a generalized model for CLE that fulfills the requirements of TRE. This model is secure against adversaries with adaptive trapdoor extraction capabilities for arbitrary identifiers, decryption capabilities for arbitrary public keys, and partial decryption capabilities. It also supports hierarchical identifiers. We propose a concrete scheme under our generalized model and prove it secure without random oracles, yielding the first strongly-secure SMCLE and the first TRE in the standard model. In addition, our technique of partial decryption is different from the previous approach. Key words: security-mediated certificateless encryption, timed-release
Sherman S. M. Chow, Volker Roth, Eleanor G. Rieffe
Added 14 Dec 2010
Updated 14 Dec 2010
Type Journal
Year 2008
Where SCN
Authors Sherman S. M. Chow, Volker Roth, Eleanor G. Rieffel
Comments (0)
books