'Cryptographic hash function' diaporamas de présentation

Chapter 4

Chapter 4. Cryptographic Hash Functions. Outline. 4.1 Hash Functions and Data Integrity 4.2 Security of Hash Functions 4.3 Iterated Hash Functions 4.4 Message Authentication Codes 4.5 Unconditionally Secure MACs. 4.1 Hash Functions and Data Integrity.

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Grid Security Services, PART II (CONNECTIVITY LAYER)

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A Study on Cryptographic Protocols for RFID Tags

PhD Dissertation Defense. A Study on Cryptographic Protocols for RFID Tags. PhD candidate: Dang Nguyen Duc Advisor: Prof . Kwangjo Kim. Information and Communications Engineering KAIST. 1st December, 2009 Cryptography and Information Security Lab @ KAIST. Contents.

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Network Security Essentials Chapter 3

Network Security Essentials Chapter 3. Fourth Edition by William Stallings (Based on Lecture slides by Lawrie Brown). Public Key Cryptography and RSA.

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Encipherment Using Modern Symmetric-Key Ciphers

Encipherment Using Modern Symmetric-Key Ciphers. Objectives. ? To show how modern standard ciphers, such as DES or AES, can be used to encipher long messages. 8-1 USE OF MODERN BLOCK CIPHERS.

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Introduction to Cryptography

Introduction to Cryptography. Based on: William Stallings, Cryptography and Network Security. Chapter 11. Cryptographic Hash Functions. Hash Functions. A hash function H accepts a variable-length block of data M as input and produces a fixed-size hash value h = H( M )

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Feasible Privacy for Lightweight RFID Systems

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Computer Forensics BACS 371

Computer Forensics BACS 371. Evidentiary Methods II Evidence Acquisition. OK, What do we do first?. Basic Forensic Methodology . Acquire the evidence Authenticate that it is the same as the original Analyze the data without modifying it. Photographing Systems.

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David Evans http://www.cs.virginia.edu/evans

Lecture 14: Public Key Infrastructure. David Evans http://www.cs.virginia.edu/evans. CS588: Security and Privacy University of Virginia Computer Science. Using RSA to Encrypt. Use 1024-bit modulus (RSA recommends >= 768) Encrypt 1M file 1024 1024-bit messages

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Authentication Methods: From Digital Signatures to Hashes

Authentication Methods: From Digital Signatures to Hashes. Lecture Motivation. We have looked at confidentiality services, and also examined the information theoretic framework for security.

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Hash Functions

EJ Jung. Hash Functions. Integrity checks. Integrity vs. Confidentiality. Integrity: attacker cannot tamper with message Encryption may not guarantee integrity! Intuition: attacker may able to modify message under encryption without learning what it is

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P ublic K ey I nfrastructure

P ublic K ey I nfrastructure. Alex Bardas. What is Cryptography ?. Cryptography is a mathematical method of protecting information Cryptography is part of, but not equal to, security In modern computing, crypto is used to remediate deficiencies in the cyber space.

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Outline

An Efficient and Secure Event Signature (EASES) Protocol for Peer-to-Peer Massively Multiplayer Online Games Mo-Che Chan, Shun-Yun Hu and Jehn-Ruey Jiang Adaptive Computing and Networking Lab. National Central University. Outline. Background Related work NEO SEA The proposed scheme EASES

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SSH Secure Login Connections over the Internet

SSH Secure Login Connections over the Internet. Tatu Yloenen SSH Communications Security. MOTIVATION. Connecting through the Internet Cheap and convenient Risky Internet does not protect transmitted data. Threats from the Internet. Network monitoring

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HASH Functions

HASH Functions. Hash Functions. condenses arbitrary message to fixed size h = H(M) usually assume hash function is public hash used to detect changes to message want a cryptographic hash function computationally infeasible to find data mapping to specific hash (one-way property)

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ELLIPTIC CURVE CRYPTOGRAPHY

ELLIPTIC CURVE CRYPTOGRAPHY. Harkeerat Bedi. Public Key Cryptography. Components Public Key, Private Key Set of Operators that work on these Keys Predefined Constraints (required by some algorithms). Elliptic Curve Cryptography. Components. Discrete Logarithm Problem (DLP).

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Payment Systems

Payment Systems. Electronic Payment Schemes. Schemes for electronic payment are multi-party protocols Payment instrument modeled by electronic coin that has a fixed value and can be exchanged with a traditional monetary instrument Parties include: Payer (customer) Payee (merchant) Bank.

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Solutions to Security and Privacy Issues in Mobile Social Networking

Solutions to Security and Privacy Issues in Mobile Social Networking. Presented By Aman Sharma Naga Mohan Pokala Pratik Kathalkar University at Buffalo. Introduction. Focus on Location Aware Mobile Social network(LAMSN) systems.

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Security Vulnerability in Identity-based Public Key Cryptosystems from Pairings

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