'Public keys' presentation slideshows

CS 4740/6740 Network Security

984 views • 89 slides

Key Establishment Schemes Workshop Document

872 views • 59 slides

Network Security: Email S ecurity , PKI

798 views • 57 slides

ECT 455/HCI 513 E-Commerce Web Site Engineering

ECT 455/HCI 513 E-Commerce Web Site Engineering Electronic Payment Systems Internet Transaction Security Online Payment Systems Online payment is the foundation of systems for EC. How does it mesh with the past and current currency systems? credit cards, debit cards, ATM, banks

1.05k views • 38 slides

Presented by Jia Guo

On Data-Centric Trust Establishment in Ephemeral Ad Hoc Networks Maxim Raya, Panagiotis Papadimitratos , Virgil D. Gligor y , Jean-Pierre Hubaux. Presented by Jia Guo. INTRODUCTION. E xisting trust notions are entity-centric and slow to change .

447 views • 38 slides

Public Key Encryption Systems

Public Key Encryption Systems. The encrypter and decrypter have different keys C = E(K E ,P) P = D(K D ,C) Often, works the other way, too. History of Public Key Cryptography. Invented by Diffie and Hellman in 1976 Merkle and Hellman developed Knapsack algorithm in 1978

474 views • 35 slides

Let the Market Drive Deployment A Strategy for Transitioning to BGP Security

SIGCOMM 2011 Toronto, ON Aug. 16, 2011. Let the Market Drive Deployment A Strategy for Transitioning to BGP Security. Phillipa Gill University of Toronto. Michael Schapira Princeton University. Sharon Goldberg Boston University. Incentives for BGP Security .

467 views • 31 slides

Internet infrastructure

486 views • 29 slides

Universally Composable Symbolic Analysis of Security Protocols

Universally Composable Symbolic Analysis of Security Protocols. Jonathan Herzog (Joint work with Ran Canetti) 7 June 2004.

441 views • 27 slides

ECE 454/CS594 Computer and Network Security

ECE 454/CS594 Computer and Network Security. Dr. Jinyuan (Stella) Sun Dept. of Electrical Engineering and Computer Science University of Tennessee Fall 2011. Security Handshake Pitfalls. Login only Mutual authentication Integrity/encryption after authentication

437 views • 26 slides

EEC-484/584 Computer Networks

EEC-484/584 Computer Networks. Lecture 16 Wenbing Zhao wenbing@ieee.org. Outline. Reminder Quiz#5 4/30 4-6pm Final Revised Wiki Page due 5/5 midnight Presentation: request for waiver will be handled FCFS Waiver request must have a revision summary and a url to your revised wiki page

447 views • 25 slides

Cryptography/Cryptanalysis, II

CS 436/636/736 February 27, 2006 Cryptography/Cryptanalysis, II Main References (this lecture) Applied Cryptography, 2/e, Schneier, Wiley Material from several chapters adapted for this set of lectures GNU Privacy Guard manual and web pages (more info on this provided later)

671 views • 23 slides

Requirements - must be able to verify that: 1. Message came from apparent source or author,

Authentication. Requirements - must be able to verify that: 1. Message came from apparent source or author, 2. Contents have not been altered, 3. Sometimes, it was sent at a certain time or sequence.

310 views • 23 slides

CHAPTER 3

CHAPTER 3. Information Privacy and Security. CHAPTER OUTLINE. Ethical Issues in Information Systems Threats to Information Security Protecting Information Resources. Ethical Issues in Information Systems. Issues and standards of conduct pertaining to the use of information systems

392 views • 22 slides

MITM ?????

MITM ?????. ???????. ????. ?????????? ????????. ??. ?? MITM Public Key ???? MITM ?? ??????? Session hijacking ???? ????. ?? MITM.

325 views • 18 slides

C HAPTER 13 Asymmetric Key Cryptography

C HAPTER 13 Asymmetric Key Cryptography.

374 views • 17 slides

DKIM Seen Through a PKIX-Focused Lens

DKIM Seen Through a PKIX-Focused Lens. April 5, 2006 Tim Polk tim.polk@nist.gov. Observations on E-Mail. Spam is rapidly overwhelming all that is good about email I delete 90% of my mail unread Much of what is left is garbage

178 views • 7 slides

MQV and HMQV in IEEE P1363

MQV and HMQV in IEEE P1363. William Whyte, Hugo Krawczyk, Alfred Menezes. Background. IEEE Std 1363-2000 includes MQV Also approved in X9.63 and by NIST for use in key exchange Since 1363-2000 issued, HMQV has been proposed Addresses perceived weaknesses in MQV Provides proof of security

245 views • 6 slides

Cryptography: Basic Concepts

Cryptography: Basic Concepts. Plaintext: message text M to be protected Ciphertext: encrypted plaintext C Key: A secret shared by sender and recipient Encryption: a mathematical transformation E of a plaintext into a cipher text using key K E(plaintext, K) = ciphertext E(M, K) = C

605 views • 5 slides

DomainKeys Identified Mail (DKIM)

565 views • 3 slides