Cryptanalysis and improvement of ID-based proxy blind signature scheme
一种基于身份的代理盲签名方案的分析与改进

The security of the Li-Zhang's ID-based proxy blind signature scheme from bilinear pairings was analyzed, and it was found that this scheme did not possess the unforgeability property. The original signer can forge a valid proxy blind signature for any message, and the proxy signer can misuse the signing capabilities. At the same time, the proxy signer can make a linkage between a signature and the corresponding message of signing protocol after signing, which is called linkability. An improved proxy blind ...