Verified Multiple-Time Signature Scheme from One-Time Signatures and Timestamping
Tallinn University of Technology/GuardTime
Abstract: In this talk, we construct a stateless tag system with efficient key generation from one-time signature schemes. We prove that the proposed tag system is forward-resistant and when combined with cryptographic timestamping, it induces a secure (existentially unforgeable) multiple-time signature scheme. Our constructions are developed and verified using the EasyCrypt framework.