'Public key cryptosystems' presentation slideshows

Computer Networks

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Public key cryptography

Public key cryptography. RSA Algorithm Diffie-Hellman key exchange. Public-Key Cryptography. traditional private/secret/single key cryptography uses one key Key is shared by both sender and receiver if the key is disclosed communications are compromised

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Computer Networks

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Cryptography

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Montgomery Multiplication

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Cryptography Modern Cryptosystems

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CSE 246: Computer Arithmetic Algorithms and Hardware Design Numbers: RNS, DBNS, Montgomory

CSE 246: Computer Arithmetic Algorithms and Hardware Design Numbers: RNS, DBNS, Montgomory. Prof Chung-Kuan Cheng Lecture 3. How to compare two RNS numbers. We can approximate the magnitude of a RNS number by the following formula. where. An Example. Suppose, x = (6|3|0) RNS (7|5|3)

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Public Key Encryption

Public Key Encryption. Dan Fleck CS 469: Security Engineering. 1. 1. These slides are modified with permission from Bill Young ( Univ of Texas). Public Key Encryption.

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Computer and Network Security

Computer and Network Security. Rabie A. Ramadan Lecture 6. RSA Other Public Key Cryptosystems Key management. Table of Contents. Public Key Cryptography and Rivest-Shamir-Adleman (RSA).

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Cryptographic Technologies

Cryptographic Technologies. Chapter 5. Goals of Cryptography. Four primary goals Many applications provide multiple cryptographic benefits simultaneously Confidentiality is most commonly addressed goal The meaning of a message is concealed by encoding it

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CS 426 (Fall 2010)

CS 426 (Fall 2010). Public Key Encryption and Digital Signatures. Review of Secret Key (Symmetric) Cryptography. Confidentiality stream ciphers (uses PRNG) block ciphers with encryption modes Integrity Cryptographic hash functions Message authentication code (keyed hash functions)

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CS 426 (Fall 2010)

CS 426 (Fall 2010). Public Key Encryption and Digital Signatures. Review of Secret Key (Symmetric) Cryptography. Confidentiality stream ciphers (uses PRNG) block ciphers with encryption modes Integrity Cryptographic hash functions Message authentication code (keyed hash functions)

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SECURITY MANAGEMENT

SECURITY MANAGEMENT. Key Management in the case of public-key cryptosystems, we assumed that a sender of a message had the public key of the receiver at its disposal so that it could encrypt the message to ensure confidentiality.

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Public Key Encryption and Digital Signatures

Public Key Encryption and Digital Signatures. Review of Secret Key (Symmetric) Cryptography. Confidentiality stream ciphers (uses PRNG) block ciphers with encryption modes Integrity Cryptographic hash functions Message authentication code (keyed hash functions)

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CSCI920 (Week 13)

CSCI920 (Week 13). Revision (II) Guilin Wang SCSSE Nov. 2010. Contact Info. Email: guilin@uow.edu.au Room: 3.203 Consultation times (updated): - Mon.: 14-16pm - Wed.: 11-13pm URL: http://www.uow.edu.au/~guilin/. Outline. Revision Strategies Exam Tips

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Bishop: Chapter 10 Key Management: Digital Signature

Bishop: Chapter 10 Key Management: Digital Signature. Topics. Key exchange Session vs interchange keys Classical vs public key methods Key generation Cryptographic key infrastructure Certificates Key storage Key escrow Key revocation Digital signatures. Digital Signature.

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Cryptosystem Properties

Cryptosystem Properties. Recall that among the desirable properties for a cryptosystem are authentication and non-repudiation Authentication means being able to determine the author from the message

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Introduction to Cryptography

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Symmetric-key Cryptosystems

Symmetric-key Cryptosystems. In the classical model of cryptosystems we have been studying, Bob and Alice secretly choose the key K K determines the encryption rule e K and decryption rule d K In the systems we have studied, d K is either the same as e K or can be easily derived from it

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Is Hierarchical Public-key Certification The Next Target For Hackers?

Is Hierarchical Public-key Certification The Next Target For Hackers?. ??????? 2005/10/06. ??. Communications of The ACM August 2004/Vol.47,No.8 By Mike Burmester and Yvo G. Desmedt. ??. Public-key Cryptosystems and Certificates How Secure is a Certifying Authority A Horizontal Approach

186 views • 11 slides