The Self-blindable U-Prove Scheme from FC'14 Is Forgeable (Short Paper)
نویسندگان
چکیده
Recently an unlinkable version of the U-Prove attributebased credential scheme was proposed at Financial Crypto ’14 [9]. 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.
منابع مشابه
The self-blindable U-Prove scheme by Hanzlik and Kluczniak is forgeable
In [HK14] an unlinkable version of the U-Prove attribute-based credential scheme is proposed. 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 unforge...
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