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    block this user Michel Abdalla Trusted member

    Research Fellow

    École normale supérieure

    A New Forward-Secure Digital Signature Scheme

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    We improve the Bellare-Miner (Crypto '99) construction of signature schemes with forward security in the random oracle model. Our scheme has signicantly shorter keys and is, therefore, more practical. By using a direct proof technique not used for forward-secure schemes before, we are able to provide better security bounds for the original construction as well as for our scheme. Bellare and Miner also presented a method for constructing such schemes without the use of the random oracle. We conclude by proposing an improvement to their method and an additional, new method for accomplishing this. Keywords: forward security, digital signatures, proven security, concrete security. Dept. of Computer Science & Engineering, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA. E-Mail: mabdalla@cs.ucsd.edu. URL: http://www-cse.ucsd.edu/users/mabdalla. Supported by CAPES under Grant BEX3019/95-2. y MIT Laboratory for Computer Science, 545 Tech...

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    Title : A New Forward-Secure Digital Signature Scheme
    Abstract : We improve the Bellare-Miner (Crypto '99) construction of signature schemes with forward security in the random oracle model. Our scheme has signicantly shorter keys and is, therefore, more practical. By using a direct proof technique not used for forward-secure schemes before, we are able to provide better security bounds for the original construction as well as for our scheme. Bellare and Miner also presented a method for constructing such schemes without the use of the random oracle. We conclude by proposing an improvement to their method and an additional, new method for accomplishing this. Keywords: forward security, digital signatures, proven security, concrete security. Dept. of Computer Science & Engineering, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA. E-Mail: mabdalla@cs.ucsd.edu. URL: http://www-cse.ucsd.edu/users/mabdalla. Supported by CAPES under Grant BEX3019/95-2. y MIT Laboratory for Computer Science, 545 Tech...
    Subject : unspecified
    Area : Computer Science
    Language : English
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    Url : http://www-cse.ucsd.edu/users/mabdalla/papers/ar2000.ps.gz
    Doi : 10.1.1.36.8398

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