'Verifier' diaporamas de présentation

Concurrent Zero-Knowledge

Concurrent Zero-Knowledge. Cynthia Dwork (IBM Almaden) Moni Naor (Weizmann) Amit Sahai (MIT). Zero-Knowledge on the Internet. Verifier 1. Verifier 2. Prover. Verifier 3. Verifier 4. Deniable Message Authentication. Bill. Linda Tripp. Monica L. Outline. 1. Zero Knowledge --

956 views • 79 slides

An Investigation of Statistical Zero-Knowledge Proofs

833 views • 58 slides

The PCP Theorem by Gap Amplification

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233-234

233-234. Sedgewick & Wayne (2004); Chazelle (2005). Linear-reduces: Cost of reduction is proportional to size of input. Traveling Salesman Problem. Best known algorithm takes exponential time!. P. Problems that can be solved in polynomial time. c.

631 views • 52 slides

CS151 Complexity Theory

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Formal Development of a Verifier

Formal Development of a Verifier. Lilian Burdy Gemplus Research Lab 28th February 2002. Agenda. Bytecode Verification issues Modelling a bytecode verifier Conclusions Demo. Agenda. Bytecode Verification issues Modelling a bytecode verifier Conclusions Demo.

352 views • 35 slides

Session VII Verifying Private Aids to Navigation

Session VII Verifying Private Aids to Navigation. Private Aid Definition. Any signal placed in the navigable waterways of the United States by any person or institution other than the U.S. Coast Guard or other branch of the Armed Forces is considered to be a private aid to navigation .

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Efficient Zero-Knowledge Argument for Correctness of a Shuffle

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Prevail: Simple and Precise Static Analysis of Untrusted Linux Kernel Extensions

Prevail: Simple and Precise Static Analysis of Untrusted Linux Kernel Extensions. Elazar Gershuni , Noam Rinetzky , Mooly Sagiv (TAU) Leonid Ryzhyk , Nadav Amit, Nina Narodytska (VMWare Research) Jorge A. Navas (SRI International) Arie Gurfinkel (University of Waterloo). eBPF Programs.

267 views • 24 slides

Localization with witnesses

Localization with witnesses. Arun Saha, Mart Molle University of California, Riverside. Position Verification. Other nodes(s) verify the position claimed by the prover, relative to: Global co-ordinate system e.g. GPS, or Local co-ordinate system Proximity to a designated point

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A Logic of Secure Systems with Tunable Adversary Models

A Logic of Secure Systems with Tunable Adversary Models. Jason Franklin With Anupam Datta , Deepak Garg , Dilsun Kaynar CyLab, Carnegie Mellon University. Motivation: Secure Access to Financial Data. Goal: An end-to-end trusted path in presence of local and network adversaries. Network.

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Complexity of Approximation

Complexity of Approximation. PCP Theory and Its Relation to Approximability. PCP (Probabilistically Checkable Proofs). An Extension of NP which has poly-time checkable proofs. A problem ?? is in NP if its membership can be proved as follows: -- The prover sends a proof of size p(n) to

357 views • 19 slides

Author: Debiao He, Sherali Zeadally , Baowen Xu, Member, IEEE, and Xinyi Huang

An Efficient Identity-Based Conditional Privacy-Preserving Authentication Scheme for Vehicular Ad Hoc Networks. Author: Debiao He, Sherali Zeadally , Baowen Xu, Member, IEEE, and Xinyi Huang Publisher: 2015 IEEE Transactions On Information Forensics And Security Presenter : ???

378 views • 17 slides

How to Go Beyond the Black-Box Simulation Barrier

How to Go Beyond the Black-Box Simulation Barrier. Boaz Barak Weizmann Institute. Alice wants to convince Bob that x 2 L. But, without him gaining any knowledge about w ! Thus, she can not simply send w to Bob! We need a more complicated, interactive protocol.

281 views • 17 slides

CMSC 414 Computer and Network Security Lecture 21

CMSC 414 Computer and Network Security Lecture 21. Jonathan Katz. Revocation. Revocation is a key component of a PKI Secret keys stolen/compromised, user leaves organization, etc. This is in addition to expiration dates included in certificates

296 views • 16 slides

Predictability Verification with Petri Net Unfoldings

Predictability Verification with Petri Net Unfoldings. Agnes Madalinski 1 and Victor Khomenko 2 1 Faculty of Engineering Science, University Austral de Chile 2 School of Computing Science, Newcastle University, UK. Predictability. 2. Concept of fault diagnosis. diagnosis. observations.

155 views • 15 slides

Sybil Attack

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The usage of a data capture tool in statistical surveys on enterprises

The usage of a data capture tool in statistical surveys on enterprises. Rossana Balestrino, Patrizia Larese Istat - Via C. Balbo 16 - 00184 Roma - Italy. UNECE/Eurostat OECD meeting on Management of Statistical Information Systems (MSIS) Geneva 17-19 May 2004. Enterprises. Households.

220 views • 8 slides

Digital Signature Usability

Digital Signature Usability. Ravi Sandhu George Mason University and TriCipher. Objectives. Emphasize usability not cryptography But they are interrelated All the same there are some purely usability issues on which we currently do a terrible job. Think outside the box.

74 views • 6 slides