Transaction System and Method for Advance a Committed Time in the Future

摘要

Transaction systems and methods for advancing a committed time in the future are described herein. In the present transaction systems and methods, the first end can be permitted to pre-hatch a time capsule signature before the committed time. The time capsule signature scheme here is conducted based on an identity-based trapdoor relation (IDTR). Moreover, an extended time capsule signature scheme is conducted based on an extended identity-based trapdoor relation (IDTR). By using an extended IDTR primitive, the present transaction systems and methods can distinguish the time capsule signature is validated before or after the committed time t.