'Cryptographic hash functions' diaporamas de présentation

Bitcoin and Blockchains

Bitcoin and Blockchains. Hakim Weatherspoon [slide liberally taken from Kevin Seqniqi , Ittay Eyal, Emin Gun Sirer, Robbert van Renesse]. CS6410. A Brave New World - The Vision of David Chaum. David Chaum PhD CS/Business Adm from Berkeley 1982

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Public-Key Cryptography and Message Authentication

Public-Key Cryptography and Message Authentication. Henric Johnson Blekinge Institute of Technology, Sweden http://www.its.bth.se/staff/hjo/ henric.johnson@bth.se. OUTLINE. Approaches to Message Authentication Secure Hash Functions Digital Signatures. Message Authentication.

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Cryptographic Hash Functions (Ch. 11)

Cryptographic Hash Functions (Ch. 11). Applications of cryptographic hash functions Simple hash functions Requirements and security Hash functions based on cipher block chaining Secure hash algorithm (SHA) SHA-3 Summary. Hash functions. Condenses arbitrary message to fixed size h = H(M)

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Cryptographic Hash Functions

Cryptographic Hash Functions. CS432. Overview. Hash Functions Hash Algorithms: MD5 (Message Digest). SHA1: (Secure Hash Algorithm). Hash functions. A hash function computes a fixed length value from a variable length source Example: Check sums in communication protocols

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CRYPTOGRAPHIC DATA INTEGRITY ALGORITHMS

CRYPTOGRAPHIC DATA INTEGRITY ALGORITHMS. Contents. CRYPTOGRAPHIC HASH FUNCTIONS MESSAGE AUTHENTICATION CODES DIGITAL SIGNATURES. 1. CRYPTOGRAPHIC HASH FUNCTIONS. Applications of Cryptographic Hash Functions Two Simple Hash Functions Requirements and Security

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Cryptographic Hash Functions

Cryptographic Hash Functions. Rocky K. C. Chang, February 2013. This set of slides addresses. Outline. Cryptographic hash functions Unkeyed and keyed hash functions Security of cryptographic hash functions Iterated hash functions Two weaknesses Message authentication codes

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

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Using Cryptography

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Foundations of Network and Computer Security

Foundations of Network and Computer Security. J ohn Black. CSCI 6268/TLEN 5550, Spring 2013. The Big (Partial) Picture. Second-Level Protocols. SSH, SSL/TLS, IPSec Electronic Cash, Electronic Voting. (Can do proofs). First-Level Protocols. Symmetric Encryption. Asymmetric Encryption.

396 views • 33 slides

Introduction to Cryptography (1)

Introduction to Cryptography (1). What is Cryptography. Cryptography In a narrow sense Mangling information into apparent unintelligibility Allowing a secret method of un-mangling In a broader sense Mathematical techniques related to information security

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David Evans cs.virginia/evans

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Digital Crime Scene Investigative Process

Digital Crime Scene Investigative Process. Acknowledgments. Dr. David Dampier and the Center for Computer Security Research (CCSR). System Preservation Phase. Evidence Searching Phase. Event Reconstruction Phase. Digital Crime Scene Investigation Process. No one right way to do it!.

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Bitcoin: Programmable Currency For Digital Future

Bitcoin: Programmable Currency For Digital Future. Presented by Amruta Patwardhan. Bitcoin: Programmable currency for digital future. What is Bitcoin? History Working of Bitcoin Attacks faced by Bitcoins Weakness of Bitcoin A Thought for improving Anonymity Conclusion.

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Boneh-Franklin Identity-based Encryption

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Lecture 4.1: Hash Functions: Introduction

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E- Business Digital Signature

E- Business Digital Signature. Varna Free University. Prof. Teodora Bakardjieva. What is a digital signature?.

291 views • 8 slides

Cryptographic Hash Functions

CS 465. Cryptographic Hash Functions. Last Updated: Aug 27, 2013. Message Digests. Input to a hash function is called a pre-image Output of a hash function is a message digests, also known as hash codes or hash values Sort of like a message fingerprint/footprint

156 views • 6 slides