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    Please use this identifier to cite or link to this item: https://tkuir.lib.tku.edu.tw/dspace/handle/987654321/45413


    Title: Cryptanalysis of Nonrepudiable Threshold Proxy Signature Schemes with Known Signers
    Authors: Hwang, Shin-jia;Chen, Chiu-chin
    Contributors: 淡江大學資訊工程學系
    Keywords: digital signature;proxy signature;threshold proxy signature
    Date: 2003-04
    Issue Date: 2010-03-26 19:13:59 (UTC+8)
    Publisher: Vilnius: Matematikos ir Informatikos Insititutas, Vilniaus Universitetas
    Abstract: Sun's nonrepudiation threshold proxy signature scheme is not secure against the collusion attack. In order to guard against the attack, Hwang et al. proposed another threshold proxy signature scheme. However, a new attack is proposed to work on both Hwang et al.'s and Sun's schemes. By executing this attack, one proxy signer and the original signer can forge any valid proxy signature. Therefore, both Hwang et al.'s scheme and Sun's scheme were insecure.
    Relation: Informatica 14(2), pp.205-212
    Appears in Collections:[Graduate Institute & Department of Computer Science and Information Engineering] Journal Article

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