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Olivier Blazy

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Researcher identifiers

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Professor at [Ecole Polytechnique](https://www.polytechnique.fr) ### Cryptography - Protocol Proof - Authenticated Key Exchange - Oblivious Transfer - Signatures ### Information Security - End to End Encryption (Signal, ...) - 5G Networks - Privacy Preserving technologies

Publications

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Anonymous attribute-based designated verifier signature

Olivier Blazy , Laura Brouilhet , Emmanuel Conchon , Mathieu Klingler
Journal of Ambient Intelligence and Humanized Computing, 2022, 68 (9), pp.6233-6244. ⟨10.1007/s12652-022-03827-8⟩
Journal articles hal-03815798v1

An IoT Attribute-Based Security Framework for Topic-based Publish/Subscribe Systems

Olivier Blazy , Emmanuel Conchon , Mathieu Klingler , Damien Sauveron
IEEE Access, 2021, pp.1-1. ⟨10.1109/ACCESS.2021.3051469⟩
Journal articles hal-03133781v1
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Cryptanalysis of a rank-based signature with short public keys

Nicolas Aragon , Olivier Blazy , Jean-Christophe Deneuville , Philippe Gaborit , Terry Shue Chien Lau et al.
Designs, Codes and Cryptography, 2020, 88 (4), pp.643-653. ⟨10.1007/s10623-019-00702-0⟩
Journal articles hal-02613891v1

New efficient M2C and M2M mutual authentication protocols for IoT-based healthcare applications

Fatma Merabet , Amina Cherif , Malika Belkadi , Olivier Blazy , Emmanuel Conchon et al.
Peer-to-Peer Networking and Applications, 2019, pp.1--36
Journal articles hal-02383456v1

SAID: Reshaping Signal into an Identity-Based Asynchronous Messaging Protocol with Authenticated Ratcheting

Olivier Blazy , Angèle Bossuat , Xavier Bultel , Pierre-Alain Fouque , Cristina Onete et al.
Cryptology ePrint Archive, 2019, 2019, pp.367
Journal articles hal-02307143v1

Post-Quantum UC-Secure Oblivious Transfer in the Standard Model with Adaptive Corruptions

Olivier Blazy , Céline Chevalier , Quoc Huy Vu
Cryptology ePrint Archive, 2019, 2019, pp.707
Journal articles hal-02307144v1

Durandal: a rank metric based signature scheme

Nicolas Aragon , Olivier Blazy , Philippe Gaborit , Adrien Hauteville , Gilles Zémor et al.
Cryptology ePrint Archive, 2018, 2018, pp.1192
Journal articles hal-02307147v1

Efficient Encryption From Random Quasi-Cyclic Codes

Carlos Aguilar Melchor , Olivier Blazy , Jean-Christophe Deneuville , Philippe Gaborit , Gilles Zémor et al.
IEEE Transactions on Information Theory, 2018, 64 (5), pp.3927-3943
Journal articles hal-01951335v1

Downgradable Identity-based Encryption and Applications

Olivier Blazy , Paul Germouty , Duong Hieu Phan
Cryptology ePrint Archive, 2018, 2018, pp.1176
Journal articles hal-02307146v1

A code-based group signature scheme

Quentin Alamélou , Olivier Blazy , Stéphane Cauchie , Philippe Gaborit
Designs, Codes and Cryptography, 2017, 82, pp.1--25. ⟨10.1007/s10623-016-0276-6⟩
Journal articles hal-03133786v1

Adaptive Oblivious Transfer and Generalizations

Olivier Blazy , Celine Chevalier , Paul Germouty
Cryptology ePrint Archive, 2016, 2016, pp.259
Journal articles hal-02307148v1

Group Signatures Without q-Assumptions

Olivier Blazy , Saqib A. Kakvi
Cryptology ePrint Archive, 2015, 2015, pp.858
Journal articles hal-02307150v1

Tightly-Secure Signatures from Chameleon Hash Functions

Olivier Blazy , Saqib A. Kakvi , Eike Kiltz , Jiaxin Pan
Cryptology ePrint Archive, 2014, 2014, pp.1021
Journal articles hal-02307151v1

New Smooth Projective Hash Functions and One-Round Authenticated Key Exchange

Fabrice Benhamouda , Olivier Blazy , Celine Chevalier , David Pointcheval , Damien Vergnaud et al.
Cryptology ePrint Archive, 2013, 2013, pp.34
Journal articles hal-02307152v1

Short Blind Signatures

Olivier Blazy , Georg Fuchsbauer , David Pointcheval , Damien Vergnaud
Journal of Computer Security, 2013, 21 (5), pp.627-661. ⟨10.3233/JCS-130477⟩
Journal articles hal-00921915v1
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How fast do you heal? A taxonomy for post-compromise security in secure-channel establishment

Olivier Blazy , Ioana Boureanu , Pascal Lafourcade , Cristina Onete , Léo Robert et al.
USENIX 2023 - The 32nd USENIX Security Symposium, Aug 2023, Anaheim, United States
Conference papers hal-03815803v1
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Post-Quantum and UC-secure Oblivious Transfer from SPHF with Grey Zone

Slim Bettaieb , Loïc Bidoux , Olivier Blazy , Baptiste Cottier , David Pointcheval et al.
15th International Symposium on Foundations & Practice of Security (FPS – 2022)., Dec 2022, Ottawa, Canada
Conference papers hal-03772089v2
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Identity-Based Encryption in DDH Hard Groups

Olivier Blazy , Saqib Kakvi
AFRICACRYPT 2022 - 13th International Conference on Cryptology in Africa, Jul 2022, Fes, Morocco. pp.81-102, ⟨10.1007/978-3-031-17433-9_4⟩
Conference papers hal-03815800v1
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(Augmented) Broadcast Encryption from Identity Based Encryption with Wildcard

Anaïs Barthoulot , Olivier Blazy , Sébastien Canard
CANS 2022 - 21st International Conference on Cryptology and Network Security, Nov 2022, Dubai, United Arab Emirates. pp.143-164, ⟨10.1007/978-3-031-20974-1_7⟩
Conference papers hal-03856239v1
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Secure Decision Forest Evaluation

Slim Bettaieb , Loic Bidoux , Olivier Blazy , Baptiste Cottier , David Pointcheval et al.
ARES 2021 - 16th International Conference on Availability, Reliability and Security, Aug 2021, Vienna, Austria. pp.1-12, ⟨10.1145/3465481.3465763⟩
Conference papers hal-03321368v1

Round-optimal Constant-size Blind Signatures

Olivier Blazy , Laura Brouilhet , Céline Chevalier , Neals Fournaise
SECRYPT 2020 - 17th International Conference on Security and Cryptography, Jul 2020, Lieusaint - Paris / Virtual, France. pp.213-224, ⟨10.5220/0009888702130224⟩
Conference papers hal-03130894v1

Skipping the q in Group Signatures

Olivier Blazy , Saqib A. Kakvi
Progress in Cryptology - INDOCRYPT 2020 - 21st International Conference on Cryptology in India, Virtual Conference, December 13-16, 2020, Proceedings, Dec 2020, Online, India. pp.553--575, ⟨10.1007/978-3-030-65277-7\_25⟩
Conference papers hal-03133783v1

CCA-Secure ABE using Tag and Pair Encoding

Olivier Blazy , Sayantan Mukherjee
Progress in Cryptology - INDOCRYPT 2020 - 21st International Conference on Cryptology in India, Virtual Conference, December 13-16, 2020, Proceedings, Dec 2020, Online, India. pp.691--714, ⟨10.1007/978-3-030-65277-7\_31⟩
Conference papers hal-03133782v1

Public-Key Generation with Verifiable Randomness

Olivier Blazy , Patrick Towa , Damien Vergnaud
Asiacrypt 2020 - 26th Annual International Conference on the Theory and Application of Cryptology and Information Security, Dec 2020, Daejeon / Virtual, South Korea. pp.97-127, ⟨10.1007/978-3-030-64837-4_4⟩
Conference papers hal-02929843v1

CROOT: Code-based Round-Optimal Oblivious Transfer

Nicolas Aragon , Olivier Blazy , Neals Fournaise , Philippe Gaborit
Proceedings of the 17th International Joint Conference on e-Business and Telecommunications, ICETE 2020 - Volume 2: SECRYPT, Lieusaint, Paris, France, July 8-10, 2020, Jul 2020, online, France. pp.76--85, ⟨10.5220/0009776700760085⟩
Conference papers hal-03133784v1

SAID: Reshaping Signal into an Identity-Based Asynchronous Messaging Protocol with Authenticated Ratcheting

Olivier Blazy , Angèle Bossuat , Xavier Bultel , Pierre-Alain Fouque , Cristina Onete et al.
IEEE European Symposium on Security and Privacy, EuroS&P 2019, Stockholm, Sweden, June 17-19, 2019, 2019, Stockholm, Sweden. pp.294--309, ⟨10.1109/EuroSP.2019.00030⟩
Conference papers hal-02307142v1

Durandal: A Rank Metric Based Signature Scheme

Nicolas Aragon , Olivier Blazy , Philippe Gaborit , Adrien Hauteville , Gilles Zémor et al.
Advances in Cryptology - EUROCRYPT 2019 - 38th Annual International Conference on the Theory and Applications of Cryptographic Techniques, Darmstadt, Germany, May 19-23, 2019, Proceedings, Part III, 2019, Darmstadt, Germany. pp.728--758, ⟨10.1007/978-3-030-17659-4\_25⟩
Conference papers hal-02307141v1

Downgradable Identity-Based Encryption and Applications

Olivier Blazy , Paul Germouty , Duong Hieu Phan
Topics in Cryptology - CT-RSA 2019 - The Cryptographers' Track at the RSA Conference 2019, San Francisco, CA, USA, March 4-8, 2019, Proceedings, 2019, San Francisco, United States. pp.44--61, ⟨10.1007/978-3-030-12612-4\_3⟩
Conference papers hal-02307140v1

Anonymous Identity Based Encryption with Traceable Identities

Olivier Blazy , Laura Brouilhet , Duong Hieu Phan
Proceedings of the 14th International Conference on Availability, Reliability and Security, ARES 2019, Canterbury, UK, August 26-29, 2019., 2019, Stockholm, Sweden. pp.13:1--13:10, ⟨10.1145/3339252.3339271⟩
Conference papers hal-02307138v1

Post-Quantum UC-Secure Oblivious Transfer in the Standard Model with Adaptive Corruptions

Olivier Blazy , Celine Chevalier , Quoc Huy Vu
Proceedings of the 14th International Conference on Availability, Reliability and Security, ARES 2019, Canterbury, UK, August 26-29, 2019., 2019, Canterbury, United Kingdom. pp.28:1--28:6, ⟨10.1145/3339252.3339280⟩
Conference papers hal-02307139v1

Spreading Alerts Quietly

Olivier Blazy , Céline Chevalier
ARES the 13th International Conference, Aug 2018, Hamburg, Germany. pp.1-6
Conference papers hal-02050170v1

Non-Interactive Key Exchange from Identity-Based Encryption

Olivier Blazy , Céline Chevalier
ARES, Aug 2018, Hamburg, Germany. pp.1-10, ⟨10.1145/3230833.3230864⟩
Conference papers hal-02050171v1

Spreading Alerts Quietly: New Insights from Theory and Practice

Olivier Blazy , Celine Chevalier
Proceedings of the 13th International Conference on Availability, Reliability and Security, ARES 2018, Hamburg, Germany, August 27-30, 2018, 2018, Hamburg, Germany. pp.30:1--30:6, ⟨10.1145/3230833.3230841⟩
Conference papers hal-02307145v1
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A code-based blind signature

Olivier Blazy , Philippe Gaborit , Julien Schrek , Nicolas Sendrier
ISIT 2017 - IEEE International Symposium on Information Theory, Jun 2017, Aachen, Germany. pp.2718--2722, ⟨10.1109/ISIT.2017.8007023⟩
Conference papers hal-01610410v1

An Efficient Protocol for UAS Security

Olivier Blazy , Emmanuel Conchon , Pierre-François Bonnefoi , Damien Sauveron , Raja Naeem Akram et al.
Integrated Communications, Navigation and Surveillance Conference (ICNS), 2017, Apr 2017, Herndon, VA, United States. ⟨10.1109/ICNSURV.2017.8011987⟩
Conference papers hal-01610409v1

Efficient ID-based Designated Verifier Signature

Olivier Blazy , Emmanuel Conchon , Paul Germouty , Amandine Jambert
Proceedings of the 12th International Conference on Availability, Reliability and Security, Reggio Calabria, Italy, August 29 - September 01, 2017, 2017, Unknown, Unknown Region. pp.44:1--44:8, ⟨10.1145/3098954.3103157⟩
Conference papers hal-01610412v1
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Almost Optimal Oblivious Transfer from QA-NIZK

Céline Chevalier , Paul Germouty , Olivier Blazy
15th International Conference on Applied Cryptography and Network Security (ACNS 2017), Jul 2017, Kanazawa, Japan. pp.579-598, ⟨10.1007/978-3-319-61204-1_29⟩
Conference papers hal-01610411v1
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Mitigating Server Breaches in Password-Based Authentication: Secure and Efficient Solutions

Olivier Blazy , Céline Chevalier , Damien Vergnaud
CT-RSA 2016, Feb 2016, San Francisco, France. ⟨10.1007/978-3-319-29485-8_1⟩
Conference papers hal-01292699v1
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Anonymizable Ring Signature Without Pairing

Olivier Blazy , Xavier Bultel , Pascal Lafourcade
9th International Symposium on Foundations & Practice of Security, 2016, Québec, Canada
Conference papers hal-01382951v1
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Structure-Preserving Smooth Projective Hashing

Olivier Blazy , Céline Chevalier
22nd Annual International Conference on the Theory and Applications of Cryptology and Information Security (ASIACRYPT 2016), Feb 2016, Hanoi, Vietnam
Conference papers hal-01382952v1
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Non-Interactive Plaintext (In-)Equality Proofs and Group Signatures with Verifiable Controllable Linkability

Olivier Blazy , David Derler , Daniel Slamanig , Raphael Spreitzer
CT-RSA 2016, Feb 2016, San Francisco, United States. pp.127-143, ⟨10.1007/978-3-319-29485-8_8⟩
Conference papers hal-01292705v1
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Adaptive Oblivious Transfer and Generalization

Olivier Blazy , Céline Chevalier , Paul Germouty
Advances in Cryptology – ASIACRYPT 2016 22nd International Conference on the Theory and Application of Cryptology and Information Security, 2016, Hanoi, Vietnam. ⟨10.1007/978-3-662-53890-6_8⟩
Conference papers hal-01382953v1

A Practical Group Signature Scheme based on Rank Metric

Quentin Alamélou , Olivier Blazy , Stéphane Cauchie , Philippe Gaborit
Waifi 2016, 2016, Unknown, Unknown Region
Conference papers hal-01382949v1
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Two Secure Anonymous Proxy-based Data Storages

Olivier Blazy , Xavier Bultel , Pascal Lafourcade
13th International Joint Conference on e-Business and Telecommunications (ICETE 2016), 2016, Lisbon, Portugal. pp.251--258, ⟨10.5220/0005962402510258⟩
Conference papers hal-01382950v1

Non-Interactive Zero-Knowledge Proofs of Non-Membership

Olivier Blazy , Céline Chevalier , Damien Vergnaud
Topics in Cryptology - CT-RSA 2015, The Cryptographer's Track at the RSA Conference 2015, Apr 2015, San Francisco, United States. pp.145-164, ⟨10.1007/978-3-319-16715-2_8⟩
Conference papers hal-01214711v1

Tightly-Secure Signatures from Chameleon Hash Functions

Olivier Blazy , Saqib A. Kakvi , Eike Kiltz , Jiaxin Pan
Public-Key Cryptography - PKC 2015 - 18th IACR International Conference on Practice and Theory in Public-Key Cryptography, Gaithersburg, MD, USA, March 30 - April 1, 2015, Proceedings, 2015, Washington DC, United States. pp.256--279, ⟨10.1007/978-3-662-46447-2\_12⟩
Conference papers hal-02307149v1
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Generic Construction of UC-Secure Oblivious Transfer

Olivier Blazy , Céline Chevalier
Applied Cryptography and Network Security - 13th International Conference, ACNS 2015, New York, NY, USA, June 2-5, 2015, Revised Selected Papers, 2015, New York, USA, United States. pp.65 - 86, ⟨10.1007/978-3-319-28166-7_4⟩
Conference papers hal-01382954v1
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A Code-Based Group Signature Scheme

Quentin Alamélou , Olivier Blazy , Stéphane Cauchie , Philippe Gaborit
The 9th International Workshop on Coding and Cryptography 2015 WCC2015, Apr 2015, Paris, France
Conference papers hal-01276464v1
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(Hierarchical) Identity-Based Encryption from Affine Message Authentication

Olivier Blazy , Eike Kiltz , Jiaxin Pan
Advances in Cryptology - Proceedings of CRYPTO '14, 2014, Santa Barbara, California, United States. pp.408-426, ⟨10.1007/978-3-662-44371-2_23⟩
Conference papers hal-01239920v1

Analysis and Improvement of Lindell's UC-Secure Commitment Schemes

Olivier Blazy , Céline Chevalier , David Pointcheval , Damien Vergnaud
ACNS 2013 - 11th International Conference Applied Cryptography and Network Security, Jun 2013, Banff, Canada. pp.534-551, ⟨10.1007/978-3-642-38980-1_34⟩
Conference papers hal-00865612v1

New Techniques for SPHFs and Efficient One-Round PAKE Protocols

Fabrice Benhamouda , Olivier Blazy , Céline Chevalier , David Pointcheval , Damien Vergnaud et al.
CRYPTO 2013 - 33rd Annual Cryptology Conference, Aug 2013, Santa Barbara, CA, United States. pp.449-475, ⟨10.1007/978-3-642-40041-4_25⟩
Conference papers hal-00864345v1

Efficient UC-Secure Authenticated Key-Exchange for Algebraic Languages

Fabrice Benhamouda , Olivier Blazy , Céline Chevalier , David Pointcheval , Damien Vergnaud et al.
PKC 2013 - 16th International Conference on Practice and Theory in Public-Key Cryptography, Feb 2013, Nara, Japan. pp.272-291, ⟨10.1007/978-3-642-36362-7_18⟩
Conference papers hal-00790633v1

SPHF-Friendly Non-Interactive Commitments

Michel Abdalla , Fabrice Benhamouda , Olivier Blazy , Céline Chevalier , David Pointcheval et al.
ASIACRYPT 2013, Dec 2013, Bangalore, India. pp.214-234, ⟨10.1007/978-3-642-42033-7_12⟩
Conference papers hal-00915542v1
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Round-Optimal Privacy-Preserving Protocols with Smooth Projective Hash Functions

Olivier Blazy , David Pointcheval , Damien Vergnaud
TCC 2012 - Ninth IACR Theory of Cryptography Conference, Mar 2012, Taormina, Italy. pp.94-112, ⟨10.1007/978-3-642-28914-9_6⟩
Conference papers hal-00672939v1

Compact Round-Optimal Partially-Blind Signatures

Olivier Blazy , David Pointcheval , Damien Vergnaud
SCN 2012 - 8th International Conference Security and Cryptography for Networks, Sep 2012, Amalfi, Italy. pp.95-112, ⟨10.1007/978-3-642-32928-9_6⟩
Conference papers hal-00764863v1

Signatures on Randomizable Ciphertexts

Olivier Blazy , Georg Fuchsbauer , David Pointcheval , Damien Vergnaud
PKC 2011 - Proceedings of the 2011 International Conference on Practice and Theory in Public Key Cryptography, Mar 2011, Taormina, Italy. pp.403-422, ⟨10.1007/978-3-642-19379-8_25⟩
Conference papers inria-00542643v1

Achieving Optimal Anonymity in Transferable E-Cash with a Judge

Olivier Blazy , Sébastien Canard , Georg Fuchsbauer , Aline Gouget , Hervé Sibert et al.
AFRICACRYPT 2011 - 4th International Conference on Cryptology in Africa, Jul 2011, Dakar, Senegal. pp.206-223, ⟨10.1007/978-3-642-21969-6_13⟩
Conference papers hal-01110485v1
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Batch Groth-Sahai

Olivier Blazy , Georg Fuchsbauer , Malika Izabachène , Amandine Jambert , Hervé Sibert et al.
Applied Cryptography and Network Security, 8th International Conference, ACNS 2010, Jun 2010, Beijing, China. pp.218-235, ⟨10.1007/978-3-642-13708-14⟩
Conference papers inria-00577167v1

Information Security Theory and Practice

Olivier Blazy , Chan Yeob Yeun
Springer International Publishing, LNCS-11469, 2019, Lecture Notes in Computer Science, 978-3-030-20073-2. ⟨10.1007/978-3-030-20074-9⟩
Books hal-02294601v1

A Rank Metric Code-Based Group Signature Scheme

Olivier Blazy , Philippe Gaborit , Dang Truong Mac
Code-Based Cryptography, 13150, Springer International Publishing, pp.1-21, 2022, Lecture Notes in Computer Science, ⟨10.1007/978-3-030-98365-9_1⟩
Book sections hal-03815793v1

A Correction to a Code-Based Blind Signature Scheme

Olivier Blazy , Philippe Gaborit , Dang Truong Mac
Code-Based Cryptography, 13150, Springer International Publishing, pp.84-94, 2022, Lecture Notes in Computer Science, ⟨10.1007/978-3-030-98365-9_5⟩
Book sections hal-03815792v1

Hash Proof Systems over Lattices Revisited

Fabrice Benhamouda , Olivier Blazy , Léo Ducas , Willy Quach
Public-Key Cryptography - PKC 2018 - 21st IACR International Conference on Practice and Theory of Public-Key Cryptography, pp.644-674, 2018
Book sections hal-02050168v1

Traceable Signature with Stepping Capabilities

Olivier Blazy , David Pointcheval
David Naccache. Cryptography and Security: From Theory to Applications : Essays Dedicated to Jean-Jacques Quisquater on the Occasion of His 65th Birthday, 6805, Springer, pp.108-131, 2012, LNCS - Lecture Notes in Computer Science, 978-3-642-28367-3. ⟨10.1007/978-3-642-28368-0_10⟩
Book sections hal-01110870v1
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Preuves de connaissances interactives et non-interactives

Olivier Blazy
Cryptographie et sécurité [cs.CR]. Université Paris-Diderot - Paris VII, 2012. Français. ⟨NNT : ⟩
Theses tel-00768787v1