Information Security and Cryptography Research Group

Special Aspects of Escrow-based E-Cash Systems

Lennart Meier

Master's thesis, Universität des Saarlandes, Saarbrücken, 2000.

Electronic cash systems are one way to implement digital payments; e-cash schemes can offer user anonymity at the same level as paper-based cash. However, this anonymity can be misused for illegal purposes; therefore, some means to revoke the anonymity under specific circumstances seems desirable. Many “escrow-based” schemes have been proposed; the information needed for this is usually escrowed at a trusted third party. In this thesis, we'll take a close look at various escrow-based e-cash schemes and investigate their security for all participants and the assumptions it is based on. The notion of “self-escrowing”, i.e. replacing the trusted third party by the user himself, will be addressed; finally, by combining some of the techniques presented, we construct an escrow-based e-cash scheme which offers strengthened security against forgery of coins.

BibTeX Citation

    author       = {Lennart Meier},
    title        = {Special Aspects of Escrow-based E-Cash Systems},
    year         = {2000},
    month        = {3},
    school       = {Universität des Saarlandes, Saarbrücken},

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