Welcome to the resource topic for 2015/725
Title:
The self-blindable U-Prove scheme from FC’14 is forgeable
Authors: Eric Verheul, Sietse Ringers, Jaap-Henk Hoepman
Abstract:Recently an unlinkable version of the U-Prove attribute-based credential scheme was proposed at Financial Crypto '14. Unfortunately, the new scheme is forgeable: if sufficiently many users work together then they can construct new credentials, containing any set of attributes of their choice, without any involvement of the issuer. In this note we show how they can achieve this and we point out the error in the unforgeability proof.
ePrint: https://eprint.iacr.org/2015/725
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