'Bob sends' diaporamas de présentation

Protocols

1.1k views • 88 slides

Security Protocols CS 136 Computer Security Peter Reiher February 14, 2008

Security Protocols CS 136 Computer Security Peter Reiher February 14, 2008. Outline. Designing secure protocols Basic protocols Key exchange Common security problems in protocols. Basics of Security Protocols. Work from the assumption (usually) that your encryption is sufficiently strong

902 views • 66 slides

VarietyCash: A Multi-purpose Electronic Payment System

586 views • 43 slides

David Evans cs.virginia/evans

386 views • 38 slides

Authentication attacks, causes and solutions

Authentication attacks, causes and solutions. Analyzing man in the middle and dictionary attacks against SSL/TLS and password based authentication systems. Fletcher Liverance, 16 April 2009. Sources. Password-Based Authentication: Preventing Dictionary Attacks

359 views • 24 slides

Good/Bad Crypto (cont.) & Bitcoin

Good/Bad Crypto (cont.) & Bitcoin. Announcements!. Exercise: Send me an encrypted message. Signal Authenticated Diffie-Hellman with Deniability. Signal Authenticated Diffie-Hellman with Deniability. Alice sends g A and g a Bob sends g B and g b. Signal

214 views • 21 slides

Security

Security. Jean Walrand EECS. Outline. Threats Cryptography Basic Mechanisms Secret Key Public Key Hashing Security Systems Integrity Key Management Identification. Threats. Basic Mechanism:. Decryption function. Cyphertext: Sent (Encrypted Text). Encryption function. Plaintext.

303 views • 16 slides