'Alice bob' presentation slideshows

1.24k views • 113 slides

Survey: Secure Composition of Multiparty Protocols

Survey: Secure Composition of Multiparty Protocols. Yehuda Lindell IBM T.J. Watson. Secure Multiparty Computation. A set of parties with private inputs.

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Black holes

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??? : ????

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DNS Cache-Poisoning: New Vulnerabilities and Implications, or: DNSSEC, the time has come!

DNS Cache-Poisoning: New Vulnerabilities and Implications, or: DNSSEC, the time has come! Amir Herzberg and Haya Shulman Dept. of Computer Science Bar Ilan University. About us. Bar Ilan University NetSec group. Haya Shulman:. Amir Herzberg:. NetSec /Crypto Researcher

515 views • 32 slides

Measuring and Circumventing Internet Censorship and Control

Measuring and Circumventing Internet Censorship and Control. Nick Feamster Georgia Tech http://www.cc.gatech.edu/~feamster/. Joint work with Sam Burnett, Santosh Vempala , Sathya Gunasekaran , Crisitan Lumezanu , Hans Klein, Wenke Lee, Phillipa Gill, and others.

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Authentication Applications

Authentication Applications. Digital Signatures Security Concerns X.509 Authentication Service Kerberos. Security Concerns. key concerns are confidentiality and timeliness to provide confidentiality must encrypt identification and session key info

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Secure Cooperative Sharing of JavaScript, Browser, and Physical Resources

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Fundamental Elliptic Curve Cryptography Algorithms draft-mcgrew-fundamental-ecc-02

Fundamental Elliptic Curve Cryptography Algorithms draft-mcgrew-fundamental-ecc-02. mcgrew@cisco. com kmigoe@nsa.gov. Elliptic Curve Cryptography. Alternative to integer-based Key Exchange and Signature algorithms Smaller keys and signatures More efficient at higher security levels.

477 views • 19 slides

Public Key Management and X.509 Certificates

Public Key Management and X.509 Certificates. CSIS 5857: Encoding and Encryption. Public Key Distribution. How does Bob know where a public key comes from? Darth can: Create a public/private key pair K DarthPR , K DarthPU Send the public key K DarthPU to Bob, claiming it is from Alice

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Sorting Out Digital Certificates

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Practical Cryptographic Secure Computation

Practical Cryptographic Secure Computation. DHOSA MURI PIs Meeting Berkeley, CA 28 April 2011. David Evans University of Virginia http://www.cs.virginia.edu/evans http://www.MightBeEvil.com. SVA. Cryptographic secure computation. e.g., Enforce properties on a malicious OS.

253 views • 17 slides

Universally- composable Security of Key Distribution from Causality Constraints

Universally- composable Security of Key Distribution from Causality Constraints. Based on results by: Masanes , Renner, Christandl , Winter and Barrett. Main Idea. Main Idea. Braunstein -Caves Bell Inequality. The Protocol. Alice. Bob. The Protocol. Alice. Bob.

266 views • 15 slides

Traversing a List

Traversing a List. Iteration. Idiom for traversing a null-terminated linked list. for ( Node x = first ; x != null ; x = x . next ) { StdOut . println ( x . item ); }. first. Alice. Bob. Carol. null. item. next. Traversing a List.

220 views • 13 slides

Traversing a List

Traversing a List. Iteration. Idiom for traversing a null-terminated linked list. for ( Node x = first ; x != null ; x = x . next ) { StdOut . println ( x . item ); }. first. Alice. Bob. Carol. null. item. next. Traversing a List.

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Quantum Bit Commitment

314 views • 11 slides

What is cryptography?

Online Cryptography Course Dan Boneh. Introduction. What is cryptography?. Crypto core. Talking to Alice. Talking to Bob. Secret key establishment: Secure communication:. Alice. Bob. a ttacker???. m 1. k. k. m 2. c onfidentiality and integrity.

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Uncoercible Communication, or How to Lie with Impunity

Uncoercible Communication, or How to Lie with Impunity. Matthew Kerner CSEP 590 3/5/06. Problem Statement. Alice broadcasts encrypted messages over a public channel Eve can see ciphertext and coerces Alice before and/or after communication Demands that Alice sends a particular message

224 views • 7 slides