Description
Server-Aided Verification (SAV) is a method that can be employed to speed up the process of verifying signatures by letting the verifier outsource part of its computation load to a third party. Achieving fast and reliable verification under the presence of an untrusted server is an attractive goal in cloud computing and internet of things scenarios.In this talk I will describe a simple and powerful framework for SAV and present a security model that refines existing while covering the new notions of SAV-anonymity and extended unforgeability. In addition, I will present the first generic transformation from any signature scheme to a single-round SAV scheme that incorporates verifiable computation."Automated verification of privacy-type properties for security protocols"par Ivan Gazeau (LORIA, Inria Nancy)Date : 16 mars 2018Lieu : Salles Petri/TuringThe applied pi-calculus is a powerful framework to model protocols and to define security properties. In this symbolic model, it is possible to verify automatically complex security properties such as strong secrecy, anonymity and unlinkability properties which are based on equivalence of processes.In this talk, we will see an overview of a verification method used by a tool, Akiss. The tool is able to handle - a wide range of cryptographic primitives (in particular AKISS is the only tool able to verify equivalence properties for protocols that use xor); - protocols with else branches (the treatment of disequalities is often complicated). We will also provide some insights on how interleaving due to concurrency can be effectively handled."
Infos pratiques
Prochains exposés
-
Vers l’émergence d’un droit européen pour la Blockchain : Une approche sous l’angle de la Privacy et de l’encadrement des crypto-actifs
Orateur : Damien Franchi - Univ Rennes, IODE
La Blockchain, technologie derrière Bitcoin, fait l’objet d’un encadrement juridique de plusen plus important, en particulier de la part de l’Union européenne. Curieusement, le mot« Blockchain » n’apparaît pas dans les textes l’encadrant. Les expressions « technologie deregistres distribués » (Distributed ledger technology, DLT), ou, parfois, « registreélectronique » lui sont plutôt privilégiées.[…]-
SoSysec
-
Law
-
-
Blockchain and digital currencies: between European regulation and technological challenges
Orateur : Loïc Miller - CentraleSupélec
As the European Union develops a legal framework for crypto-assets and data protection, the technological question underlying the emergence of a genuine digital currency remains open. Blockchain today stands as an interdisciplinary field of study at the crossroads of computer science, economics, and law. This presentation will place the ongoing regulatory framework in perspective with the[…]-
SoSysec
-
Distributed systems
-
-
Hardware-Software Co-Designs for Microarchitectural Security
Orateur : Lesly-Ann Daniel - EURECOM
Microarchitectural optimizations, such as caches and speculative out-of-order execution, are essential for achieving high performance. However, these same mechanisms also open the door to attacks that can undermine software-enforced security policies. The current gold standard for defending against such attacks is the constant-time programming discipline, which prohibits secret-dependent control[…]-
SoSysec
-
Hardware/software co-design
-
Micro-architectural vulnerabilities
-