'Discrete logarithms' diaporamas de présentation

Quantum Computing

1.32k views • 77 slides

Cryptographic Privacy Protocols

Microsoft Research, May 2010. Markulf Kohlweiss, Microsoft Research markulf@microsoft.com . Cryptographic Privacy Protocols. User. Privacy Friendly Services and Identity Management. Political orientation. Hobbies / obsessions. Behavioral data. Favorite news site. Book purchases.

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Lecture 7 Discrete Logarithms

Lecture 7 Discrete Logarithms.

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Cryptography and Network Security Chapter 13

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A Public Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms

A Public Key Cryptosystem and a Signature Scheme Based on Discrete Logarithms. TAHER ELGAMAL IEEE TRANSACTIONS ON INFORMATION THEORY, JULY 1985 Suhyung Kim Yeojeong Yoon 2010. 2. 25. Outline. Introduction Diffie -Hellman key distribution Elgamal Public Key System

222 views • 22 slides

Cryptography and Network Security Chapter 8

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Cryptography and Network Security Chapter 8

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Zero-Knowledge Proofs

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357 views • 17 slides

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CS290A, Spring 2005: Quantum Information & Quantum Computation

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Attacks on the RSA Algorithm

Attacks on the RSA Algorithm. CSIS 5857: Encoding and Encryption. Short Message Attacks. Typical use of public key algorithm: Generating short messages Symmetric keys (used then to send rest of message) Social security numbers, etc. Idea: Adversary acquires public key E , n

393 views • 16 slides

Chapter 8 Introduction to Number Theory

Chapter 8 Introduction to Number Theory. Prime Numbers. prime numbers only have divisors of 1 and self they cannot be written as a product of other numbers note: 1 is prime, but is generally not of interest eg. 2,3,5,7 are prime, 4,6,8,9,10 are not

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Introduction to Number Theory

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Introduction to Number Theory

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CPSC 3730 Cryptography

CPSC 3730 Cryptography. Chapter 8 Introduction to Number Theory. Prime Numbers. prime numbers only have divisors of 1 and self they cannot be written as a product of other numbers note: 1 is prime, but is generally not of interest eg. 2,3,5,7 are prime, 4,6,8,9,10 are not

277 views • 12 slides

Digital Signatures

Digital Signatures. Ajaykumar Poondla CSC 692. Objective. The goal is to present the idea of digital signatures and the two commonly used digital signature algorithms RSA Signature scheme Elgamal Signature scheme. Digital Signatures.

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ElGamal Digital Signatures

ElGamal Digital Signatures. signature variant of ElGamal, related to D-H so uses exponentiation in a finite (Galois) with security based difficulty of computing discrete logarithms, as in D-H use private key for encryption (signing) uses public key for decryption (verification)

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Modular Arithmetic Warmup

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Modular Arithmetic Warmup

142 views • 3 slides