University of Macau
The authors propose a new server-based protocol for Timed Release Encryption (TRE), sometimes referred to as \"Sending information into the future\". As with other recently-proposed schemes, the authors' 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. Their 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.