On the (im)possibility of ElGamal blind signatures

ePrint Report: On the (im)possibility of ElGamal blind signatures

Liliya Akhmetzyanova, Evgeny Alekseev, Alexandra Babueva, Stanislav Smyshlyaev

In the current paper we investigate the possibility of designing secure blind signature scheme based on ElGamal signature equation. We define the generalized construction and analyze its security. We consider two types of schemes with the proposed construction, that cover all existing schemes. For schemes of the first type we provide generic ROS-style attack that violates unforgeability in the parallel setting. For schemes …

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