Research Article
Low-cost Anonymous Timed-Release Encryption
@INPROCEEDINGS{10.1109/IAS.2007.10, author={D. Hristu-Varsakelis and K. Chalkias and G. Stephanides}, title={Low-cost Anonymous Timed-Release Encryption}, proceedings={3rd International ICST Symposium on Information Assurance and Security}, publisher={IEEE}, proceedings_a={IAS}, year={2007}, month={9}, keywords={bilinear pairings cryptographic protocols multiple time-servers. timed-release encryption}, doi={10.1109/IAS.2007.10} }- D. Hristu-Varsakelis
K. Chalkias
G. Stephanides
Year: 2007
Low-cost Anonymous Timed-Release Encryption
IAS
IEEE
DOI: 10.1109/IAS.2007.10
Abstract
We propose a new server-based efficient protocol for time-release encryption (TRE), or - as sometimes referred to - sending information "into the future". As with other recently-proposed schemes, ours is based on the use of bilinear pairings on any Gap Diffie-Hellman group, allowing absolute release time of the encrypted data. Our protocol possesses the required properties regarding user anonymity and server passivity. It also provides almost-costless scalability in settings with multiple time-servers, and improves significantly upon existing TRE schemes, in terms of computational and communication cost. This makes our approach well-suited to a number of emerging e-applications that require future decryption of confidential data.