Sylvain Pasini

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Efficient Deniable Authentication for Signatures

Jean Monnerat, Sylvain Pasini, Serge Vaudenay

Lecture Notes in Computer Science > Applied Cryptography and Network Security > Authentication and Anonymity > 272-291

Releasing a classical digital signature faces to privacy issues. Indeed, there are cases where the prover needs to authenticate some data without making it possible for any malicious verifier to transfer the proof to anyone else. It is for instance the case for e-passports where the signature from the national authority authenticates personal data. To solve this problem, we can prove knowledge of...

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SAS-Based Authenticated Key Agreement

Sylvain Pasini, Serge Vaudenay

Lecture Notes in Computer Science > Public Key Cryptography - PKC 2006 > Authentication and Key Establishment > 395-409

Key agreement protocols are frequently based on the Diffie-Hellman protocol but require authenticating the protocol messages in two ways. This can be made by a cross-authentication protocol. Such protocols, based on the assumption that a channel which can authenticate short strings is available (SAS-based), have been proposed by Vaudenay. In this paper, we survey existing protocols and we propose...

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Hash-and-Sign with Weak Hashing Made Secure

Sylvain Pasini, Serge Vaudenay

Lecture Notes in Computer Science > Information Security and Privacy > Authentication > 338-354

Digital signatures are often proven to be secure in the random oracle model while hash functions deviate more and more from this idealization. Liskov proposed to model a weak hash function by a random oracle together with another oracle allowing to break some properties of the hash function, e.g. a preimage oracle. To avoid the need for collision-resistance, Bellare and Rogaway proposed to use target...

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An Optimal Non-interactive Message Authentication Protocol

Sylvain Pasini, Serge Vaudenay

Lecture Notes in Computer Science > Topics in Cryptology – CT-RSA 2006 > Message Authentication > 280-294

Vaudenay recently proposed a message authentication protocol which is interactive and based on short authenticated strings (SAS). We study here SAS-based non-interactive message authentication protocols (NIMAP). We start by the analysis of two popular non-interactive message authentication protocols. The first one is based on a collision-resistant hash function and was presented by Balfanz et al....

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SAS-Based Group Authentication and Key Agreement Protocols

Sven Laur, Sylvain Pasini

Lecture Notes in Computer Science > Public Key Cryptography – PKC 2008 > Session IV: Identification, Broadcast and Key Agreement > 197-213

New trends in consumer electronics have created a strong demand for fast, reliable and user-friendly key agreement protocols. However, many key agreement protocols are secure only against passive attacks. Therefore, message authentication is often unavoidable in order to achieve security against active adversaries. Pasini and Vaudenay were the first to propose a new compelling methodology for message...

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Search results for: Sylvain Pasini

Efficient Deniable Authentication for Signatures

SAS-Based Authenticated Key Agreement

Hash-and-Sign with Weak Hashing Made Secure

An Optimal Non-interactive Message Authentication Protocol

SAS-Based Group Authentication and Key Agreement Protocols

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INFONA - science communication portal

Search results for: Sylvain Pasini

Efficient Deniable Authentication for Signatures

SAS-Based Authenticated Key Agreement

Hash-and-Sign with Weak Hashing Made Secure

An Optimal Non-interactive Message Authentication Protocol

SAS-Based Group Authentication and Key Agreement Protocols

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