Fair Tracing without Trustees
نویسندگان
چکیده
منابع مشابه
Fair tracing based on VSS and blind signature without Trustees
We propose a tracing scheme of e-cash which has not only fair tracing ability but also lower computational complexity for comparisons. Many other protocols allow optimistic fair tracing which means that illegal tracing can be found after tracing and depositing in bank. But in this scheme, illegal tracing done by bank alone is impossible. We propose a marking mechanism based on a variant of an O...
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A new fair electronic cash system is proposed based on group blind signature and secret sharing scheme. Our proposed system is dynamic: we propose a method to delete the dishonest banks that maybe attack the system, which was not mentioned in the previous literatures. Our proposed scheme does not need a trusted third party to trace users: a shop owning suspicious ecoin and the bank having issue...
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We investigate how the behaviors of malicious trusted parties affect participants of optimistic non-repudiation protocols. We introduce a notion of risk balance for exchange protocols. Intuitively, risk balance refers to fairness in the amount of protection a protocol offers to the participants against malicious trustees. We explore how risk balance relates to the notions of accountable trustee...
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Cryptography has been instrumental in reducing the involvement of overhead third parties in protocols. For example; a digital signature scheme assures a recipient that a judge who is not present at message transmission will nevertheless approve the validity of the signature. Similarly, in oo-line electronic cash the bank (which is oo-line during a purchase) is assured that if a user double spen...
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The magic ink signature recently proposed in [11] is a blind signature which allows “unblinding” of a signature by authorities to establish what is known as audit trail and anonymity revocation in case of criminal activities. In [11] as well as in all the previous fair blind signature schemes (e. g., [2] and [10]), trustees need to search a database maintained by signers to obtain a transcript ...
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