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    Improvement of a convertible undeniable partially blind signature scheme

    20219_downloaded_stream_207.pdf (197.0Kb)
    Access Status
    Open access
    Authors
    Han, Song
    Chang, Elizabeth
    Dillon, Tharam S.
    Wang, J.
    Date
    2006
    Type
    Conference Paper
    
    Metadata
    Show full item record
    Citation
    Han, Song and Chang, Elizabeth and Dillon, Tharam and Wang, Jie. 2006. : Improvement of a convertible undeniable partially blind signature scheme, in Martin, D.C. (ed), IEEE 20th International Conference on Advanced Information Networking and Applications (AINA), Apr 18 2006, pp. 875-882. Vienna, Austria: IEEE Computer Society Press.
    Source Title
    Proceedings of the IEEE 20th International Conference on Advanced Information Networking and Applications (AINA)
    Source Conference
    IEEE 20th International Conference on Advanced Information Networking and Applications (AINA)
    Faculty
    Curtin Business School
    School
    Centre for Extended Enterprises and Business Intelligence
    Remarks

    Copyright 2006 IEEE

    This material is presented to ensure timely dissemination of scholarly and technical work. Copyright and all rights therein are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by each author's copyright. In most cases, these works may not be reposted without the explicit permission of the copyright holder.

    URI
    http://hdl.handle.net/20.500.11937/42625
    Collection
    • Curtin Research Publications
    Abstract

    Undeniable signatures are the digital signatures that should be verified with the help of the signer. A signer may disavow a genuine document, if the signature is only verifiable with the aid of the signer under the condition that the signer is not honest. Undeniable signatures solve this problem by adding a new feature called the disavowal protocol in addition to the normal components of signature and verification. Disavowal protocol is able to prevent a dishonest signer from disavowing a valid signature. In some situations, an undeniable signature should be converted into a normal digital signature in order that the signature can be universally verified. Blind signatures are the digital signatures that help a user to get a signature on a message without revealing the content of the message to a signer. For the blind signatures, if the signer is able to make an agreement with the user, then the underlying signer may include some common information that is known to the user, then such signatures are partially blind signatures. Convertible undeniable partially blind signatures are of the features of undeniable signatures, blind signatures, convertible undeniable signatures, and partially blind signatures. Recently, a convertible undeniable partially blind signature scheme was presented. In this paper, we first analyse a security flaw of the convertible undeniable partially blind signature scheme. To address the security flaw, we present an improvement on the disavowal protocol. The improved scheme can prevent the signer from either proving that a given valid signature as invalid, or cheating the verifier.

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