On the Security of Some Proxy Blind Signature Schemes

  title={On the Security of Some Proxy Blind Signature Schemes},
  author={Hung-Min Sun and Bin-Tsan Hsieh},
A proxy blind signature scheme is a digital signature scheme which combines the properties of proxy signature and blind signature schemes. Recently, Tan et al. proposed two proxy blind signature schemes based on DLP and ECDLP respectively. Later, compared with Tan et al.’s scheme, Lal and Awasthi further proposed a more efficient proxy blind signature scheme. In this paper, we show that Tan et al.’s schemes do not satisfy the unforgeability and unlinkability properties. Moreover, we also point… CONTINUE READING
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