A tapestry of identity-based encryption: practical frameworks compared
DOI: 10.1504/IJACT.2008.017047 | Xavier Boyen | This paper surveys the practical benefits and drawbacks of several identity-based encryption schemes based on bilinear pairings. After providing some background on identity-based cryptography, we classify the known constructions into a hand... | 3 - 21 |
Homomorphic encryption and secure comparison
DOI: 10.1504/IJACT.2008.017047 | Ivan Damgard, Martin Geisler, Mikkel Kroigard | We propose a protocol for secure comparison of integers based on homomorphic encryption. We also propose a homomorphic encryption scheme that can be used in our protocol, makes it more efficient than previous solutions, and can also be used... | 22 - 31 |
Practical key-recovery attack against APOP, an MD5-based challenge-response authentication
DOI: 10.1504/IJACT.2008.017047 | Gaetan Leurent | Hash functions are used in many cryptographic constructions under various assumptions, and the practical impact of collision attacks is often unclear. In this paper, we show how collisions can be used to recover part of the password used in... | 32 - 46 |
Delayed password disclosure
DOI: 10.1504/IJACT.2008.017047 | Markus Jakobsson, Steven Myers | We present a new authentication protocol called Delayed Password Disclosure (DPD). Based on the traditional username and password paradigm, the protocol|s goal is aimed at reducing the effectiveness of phishing/spoofing attacks that are bec... | 47 - 59 |
The power of identification schemes
DOI: 10.1504/IJACT.2008.017047 | Kaoru Kurosawa, Swee-Huay Heng | In this paper, we show that Identification schemes (ID-schemes) are very powerful in some areas of cryptography. We first prove an equivalence between non-interactive trapdoor commitment schemes and a natural class of ID-schemes. We next pr... | 60 - 69 |
An optimistic fair exchange protocol and its security in the universal composability framework
DOI: 10.1504/IJACT.2008.017047 | Yusuke Okada, Yoshifumi Manabe, Tatsuaki Okamoto | Fair exchange protocols allow both or neither of two parties to obtain the other|s items, and this property is essential in e-commerce. In this paper, we construct an optimistic fair exchange protocol that is applicable to any digital signa... | 70 - 77 |
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