Trusted time

Time stamping is an increasingly valuable complement to digital signing practices, enabling organizations to record when a digital item—such as a message, document, transaction or piece of software—was signed.…

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How to use ZKP to prove set membership without exposing the set or the member

Walther WSR-16 mechanical calculator. The row of digit-wheels in the carriage (at the front), is the AccumulatorI present a simple example with a prover and a verifier who do not know each other in advance and only share data in the form of a commitment to a set. The source…

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