Applications of Ramanujan Graphs in Cryptography

Applications of Ramanujan Graphs in Cryptography. Kristin Lauter Microsoft Research Cryptography Group IPAM Expander Graphs and Applications February 12, 2008. joint work. with Denis Charles and Eyal Goren: Cryptographic hash functions from expander graphs , Journal of Cryptology, 2007

1.24k views • 23 slides

Overview of Cryptography and Its Applications

INCS741: Cryptography. Overview of Cryptography and Its Applications. Dr. Monther Aldwairi New York Institute of Technology- Amman Campus. Motivation. Historically Kings communicated with their generals using cryptographic methods. Julius Caesar used a cipher named after him.

1.03k views • 14 slides

[3ICT1] Security - Cryptography -

Cryptography. OverviewQuick History, Fundamentals, Threats

525 views • 25 slides

Network Security Cryptography

348 views • 17 slides

Security Definitions in Computational Cryptography

Cryptographic Concepts. Signature schemeSymmetric encryption scheme. Signature Scheme. Key generation algorithm Input: security parameter nOutput: a private signing

230 views • 13 slides

Security and Cryptography

Security and Cryptography. Security: all issues which make secure communication (information transmission, two (multiple) party interaction) over insecure channels . Cryptography: the science and art of manipulating messages to make them secure. Classical cryptographic techniques.

371 views • 24 slides

Security and Cryptography

Security and Cryptography. CSE 461 Ben Greenstein Jeremy Elson TA: Ivan Beschastnikh. Administrivia. Project 3, part 2 due December 5 Special extended office hours: Tuesday, December 2, 11:30-1:30 Room 218 No HW this week. Security in Practice. Attackers have the advantage

591 views • 48 slides

Cryptography in Internet Security

Cryptography in Internet Security. Prabhaker Mateti. Computationally Infeasible. certain computation that we are talking about takes way too long (hundreds of years)  to compute using the fastest of (super) computers.  128-bit numbers 340,282,366,920,938,463,463,374,607,431,768,211,456

531 views • 41 slides

Computer Security -- Cryptography

Computer Security -- Cryptography. Chapter 3 Key Management Message Authentication Digital Signature. Part 1 Key Management. Key Distribution in Symmetric System. symmetric schemes require both parties to share a common secret key issue is how to securely distribute this key

936 views • 78 slides

Security and Cryptography

Security and Cryptography. Security Threats. Impersonation Pretend to be someone else to gain access to information or services Lack of secrecy Eavesdrop on data over network Corruption Modify data over network Break-ins Take advantage of implementation bugs Denial of Service

469 views • 37 slides

Security Basics (Cryptography)

Security Basics (Cryptography). SSE USTC Qing Ding. Agenda. What is and Why network security? What security services do we need? Cryptographic process Public key vs. Secret key scheme Digital signing, Tamper-proofing & Encrypting Security (Cryptographic) technologies

963 views • 79 slides

Security Definitions in Computational Cryptography

18739A: Foundations of Security and Privacy. Security Definitions in Computational Cryptography. Anupam Datta CMU Fall 2009. Cryptographic Concepts. Signature scheme Symmetric encryption scheme. Signature Scheme. Key generation algorithm Input: security parameter n

297 views • 13 slides

Computer Security -- Cryptography

Computer Security -- Cryptography. Chapter 2 Public-Key Encryption. Outline. Review of Number Theory Public-key Cryptography. Prime Numbers. prime numbers only have divisors of 1 and self they cannot be written as a product of other numbers

723 views • 51 slides

Security and Cryptography

Security and Cryptography. Portions stolen from Prof. Sahai (spring 2001). December 4, 2001. Administrivia. Homework assignment 7 due today Homework Assignment 8 due January 7,2002 Homework 9 Part a due next Tuesday Part b due next Thursday Part c due next Friday Lab 8 this week

897 views • 75 slides

Security: Cryptography

Security: Cryptography. I206 Spring 2012 John Chuang. Some slides adapted from Coulouris, Dollimore and Kindberg; Dave Messerschmidt; Adrian Perrig. Eavesdropping passwords, credit card numbers, etc. Tampering of data Birthday attack Impersonation Replay attack

273 views • 16 slides

Security & Cryptography

Security & Cryptography. Protection vs Security. The protection mechanisms (ACLs, etc) discussed earlier assist us in preventing unauthorized access and use of computer resources what happens if an intruder bypasses the protection mechanisms?

520 views • 37 slides

The Security of Quantum Cryptography

The Security of Quantum Cryptography. Vasil Penchev , Assoc. Prof., PhD. vasildinev@gmail.com. http://www. esnips.com/web/vasilpenchevsnews. Institute for Philosophical Research, Bulgarian Academy of Science. My story has three heroes. This is Alice. Alice has a message to Bob.

634 views • 45 slides

Overview of Cryptography & Its Applications

Overview of Cryptography & Its Applications. People wants and needs privacy and security while communicating

402 views • 19 slides

Security and Cryptography

Security and Cryptography. Security: all issues which make secure communication (information transmission, two (multiple) party interaction) over insecure channels . Cryptography: the science and art of manipulating messages to make them secure. Classical cryptographic techniques.

383 views • 24 slides

Applications of Quantum Cryptography – QKD

Applications of Quantum Cryptography – QKD. CS551/851 CR yptography A pplications B istro Mike McNett 6 April 2004 Paper: Chip Elliott, David Pearson, and Gregory Troxel. “ Quantum Cryptography in Practice ”. Outline. Basics of QKD History of QKD Protocols for QKD BB84 Protocol

331 views • 27 slides

Security and Cryptography

Security and Cryptography. CS-502 Operating Systems Fall 2007 (Slides include materials from Operating System Concepts , 7 th ed., by Silbershatz, Galvin, & Gagne and from Modern Operating Systems , 2 nd ed., by Tanenbaum). Puzzle. Alice wishes to send secret message to Bob

566 views • 54 slides

Security through Cryptography

Track 2 Workshop June 30, 2010 American Samoa Hervey Allen. Security through Cryptography. Securing your Server. So, you wanna secure your server? The usual steps apply: Run only what you need – nothing extra. Keep it up-to-date. Is your kernel “patchable”?

482 views • 46 slides