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Temporal Signature

Bill Roscoe

Modern architectures such as the blockchain can enable distributed parties to achieve common knowledge and agreed timestamping.  We exploit this to develop a new and extremely efficient form of signature which has the advantage of almost certainly being quantum resistant.  We provide definitions of signature formation and verification, PKI and certification authorities (CA) including a form of zero-knowledge proof by which Alice can convice a CA that she knows her "private key".

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