Cryptology ePrint Archive: Report 2007/216

Unlinkable Divisible Digital Cash without Trusted Third Party

Pawel Pszona and Grzegorz Stachowiak

Abstract: We present an efficient divisible digital cash scheme which is unlinkable and does not require Trusted Third Party. The size of the coin is proportional to the size of the primes we use, i.e., hundreds of bytes. The computational and communication complexity of the protocol is proportional to a polynomial of the size of the primes and polylogarithm of the maximum number of pieces to which a coin can be subdivided.

Category / Keywords: cryptographic protocols / digital cash, divisibility, unlinkability

Date: received 6 Jun 2007, last revised 5 Jul 2007

Contact author: gst at ii uni wroc pl

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Version: 20070705:132802 (All versions of this report)

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