Authors
D Hristu-Varsakelis, K Chalkias, G Stephanides
Publication date
2008/3/1
Journal
Journal of Information Assurance and Security
Volume
2
Pages
80-88
Description
We propose a new server-based protocol for timedrelease encryption (TRE), sometimes referred to as “sending information into the future”. As with other recently-proposed schemes, ours is based on the use of bilinear pairings on a Gap Diffie-Hellman group, and allows a sender to specify with precision the release time of the encrypted data. Our protocol possesses various required properties related to security, user anonymity and server passivity. It also provides almost-costless scalability in settings with multiple timeservers, and improves significantly upon existing TRE schemes, in terms of communication cost. The basic version of our protocol is extended to include new desirable features, such as message preopening, and “hiding” of important details associated with a ciphertext, thus making our approach well-suited to a number of emerging e-applications that require future decryption of confidential data.
Total citations
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Scholar articles
D Hristu-Varsakelis, K Chalkias, G Stephanides - Journal of Information Assurance and Security, 2008