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eprint.iacr.org
ded abstract of this paper appears in PKC 2009, S. Jarecki, G. Tsudik (Eds.), volume 5443 of LNCS, pp. 357-376, Sringer-Verlag, 2009....
Jun Shao, Zhenfu Cao
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PKC - 2009
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www.cits.rub.de
We address the problem of polynomial time factoring RSA moduli N1 = p1q1 with the help of an oracle. As opposed to other approaches that require an oracle that explicitly outputs bits of p1, we use ...
Alexander May, Maike Ritzenhofen
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PKC - 2009
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eprint.iacr.org
This paper describes new methods in pairing-based signature schemes for identifying the invalid digital signatures in a batch, after batch verification has failed. These methods efficiently identify non-trivial numbers of invalid signatures in batches of (potentially large) numbers of signatures....
Brian J. Matt
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PKC - 2009
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eprint.iacr.org
Recently, the new Multibase Non-Adjacent Form (mbNAF) method was introduced and shown to speed up the execution of the scalar multiplication with an efficient use of multiple bases to represent the scalar. In this work, we first optimize the previous method using fractional windows, and then introduce further improvements to achieve additional cost reductions....
Patrick Longa, Catherine H. Gebotys
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PKC - 2009
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www.dice.ucl.ac.be
At Crypto'07, Goyal introduced the concept of Accountable Authority Identity-Based Encryption as a convenient tool to reduce the amount of trust in authorities in Identity-Based Encryption. In this model, if the Private Key Generator (PKG) maliciously re-distributes users' decryption keys, it runs the risk of being caught and prosecuted....
Benoît Libert, Damien Vergnaud
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PKC - 2009
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eprint.iacr.org
Abstract. Traitor tracing schemes are cryptographically secure broadcast methods that allow identification of conspirators: if a pirate key is generated by k traitors out of a static set of legitimate users, then all traitors can be identified given the pirate key. In this paper we address three practicality and security issues of the Boneh-Franklin traitor-tracing scheme....
Pascal Junod, Alexandre Karlov, Arjen K. Lenstra
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PKC - 2009
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members.home.nl
Similar to verifiable shuffling (or, mixing), we consider the problem of verifiable rotating (and random re-encrypting) a given list of homomorphic encryptions. The offset by which the list is rotated (cyclic shift) should remain hidden....
Sebastiaan de Hoogh, Berry Schoenmakers, Boris Skoric, José Villegas
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PKC - 2009
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www.cits.rub.de
TCHo is a public key encryption scheme based on a stream cipher component, which is particular suitable for low cost devices like RFIDs. In its basic version, TCHo offers no IND-CCA2 security, but the authors suggest to use a generic hybrid construction to achieve this security level....
Mathias Herrmann, Gregor Leander
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PKC - 2009
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eprint.iacr.org
A key exchange protocol allows a set of parties to agree upon a secret session key over a public network. Two-party key exchange (2PKE) protocols have been rigorously analyzed under various models considering different adversarial actions. However, the analysis of group key exchange (GKE) protocols has not been as extensive as that of 2PKE protocols....
M. Choudary Gorantla, Colin Boyd, Juan Manuel González Nieto
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PKC - 2009
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