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Blind signatures are online by definition. They involve at least two independent parties that interact during the signature generation process. A protocol is "online" if a successful execution of the protocol requires an exchange of messages between two or more independent parties. Consequently, no application of blind signatures, including a digital cash ...


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Zerocash is such a decentralized currency scheme. A Zerocash transaction completely hides the origin, amount, and destination of the transaction. It achieves this via a cryptographic tool called a zkSNARK, which effectively allows you to prove the validity of a statement in "zero knowledge", i.e. you leak nothing more than the truth of the statement. In ...



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