'Key size' diaporamas de présentation

SEC835

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CSCE 727 Cryptography

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CS 445 / 645 Internet Security Mon & Wed, 11:30 AM ~ 12:45 PM @ SEB 1240 Spring, 2012

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CSCE 715: Network Systems Security

CSCE 715: Network Systems Security. Chin-Tser Huang huangct@cse.sc.edu University of South Carolina. Block Ciphers. One of the most widely used types of cryptographic algorithms Provide confidentiality and/or authentication services E.g. DES (Data Encryption Standard).

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Cryptography

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Cryptography

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Ch 3: Block Ciphers and the Data Encryption Standard

Information and Network Security. Ch 3: Block Ciphers and the Data Encryption Standard. Modern Block Ciphers. will now look at modern block ciphers one of the most widely used types of cryptographic algorithms provide secrecy and/or authentication services

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Cryptographic Tools

Cryptographic Tools. Three basic tools are used Encryption is used to provide confidentiality Digital signatures are used to provide authentication, integrity protection, and non-repudiation Checksums/hash algorithms are used to provide integrity protection

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C HAPTER 12 Symmetric Key Cryptography

C HAPTER 12 Symmetric Key Cryptography.

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Cryptography Enabled RFID and NVRAM

Cryptography Enabled RFID and NVRAM. Sudhanshu Khanna Ben Calhoun RLP VLSI Group, University of Virginia. Outline. Privacy and Security threats of RFIDs Technical Challenges in implementing cryptography in RFIDs Proposed Solutions: NVRAM is key Chip plans. RFIDs: Widespread and Ubiquitous.

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Security Definition

Security Definition. Unconditional Security The system cannot be defeated, no matter how much power is available by the adversary. Computational security

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IS 302: Information Security and Trust Week 4: Asymmetric Encryption

IS 302: Information Security and Trust Week 4: Asymmetric Encryption. 2012. Review. Symmetric block ciphers DES 3-DES AES ECB, CBC. key distribution and key management. Asymmetric Cryptosystem. Bob. private key d public key e Encryption: C=E(e , P )

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Kasumi Block Cipher

Kasumi Block Cipher. Data Encryptors Darshan Gandhi Rushabh Pasad. Introduction. Used in 3GPP Confidentiality and Integrity Algorithms. Technical Specifications: Key Size: 128 bits Block Size: 64 bits (64 bit output from a 64 bit input). Number of Rounds: 8. Block Diagram.

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Forward-Secure Signatures with Untrusted Update

Forward-Secure Signatures with Untrusted Update. Xavier Boyen Voltage. Hovav Shacham Weizmann. Emily Shen MIT. Brent Waters SRI International. Detection Center. Signing Key. Worm List Distribution. Users. Time. Verification Key. Detection Center. Signing Key.

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Chapter 3

Chapter 3. Block Ciphers and the Data Encryption Standard. Stream Cipher. Block Cipher. Stream Cipher and Block Cipher. Table 3.1 Encryption and Decryption Tables for Substitution Cipher of Figure 3.2 . Feistel Cipher.

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INTRODUCTION

Beyond Fixed Key Size: Classifications Toward a Balance Between Security and Performance by Abdullah Almuhaideb,Mohammed Alhabeeb,Phu Dung Le, Bala Srinivasan Presented by: Anirudh Rao Vasudeva Rao Abha Chaudhary Varshinee Krishnamurthy. INTRODUCTION. Motivation:

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ZRTP: Media Path Key Agreement for Unicast Secure RTP

ZRTP: Media Path Key Agreement for Unicast Secure RTP. April 2011 , RFC 6189 Author(s): P. Zimmermann, A. Johnston, J. Callas Speaker :Ted. Outline. Introduction Background ZRTP Conclusion Reference. Introduction.

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Additional Algorithms and Identifiers for Elliptic Curve Cryptography in PKIX

Additional Algorithms and Identifiers for Elliptic Curve Cryptography in PKIX. Dan Brown, Certicom Research November 10, 2004. Purpose of I-D. New algorithm identifiers for: NIST recommended curves (FIPS 186-2) New random curve generation ECDSA with new SHAs ECDH & ECMQV with new SHAs

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Additional Algorithms and Identifiers for Elliptic Curve Cryptography in PKIX

Additional Algorithms and Identifiers for Elliptic Curve Cryptography in PKIX. Dan Brown, Certicom Research November 10, 2004. Purpose of I-D. New algorithm identifiers for: NIST recommended curves (FIPS 186-2) New random curve generation ECDSA with new SHAs ECDH & ECMQV with new SHAs

233 views • 9 slides

Feistel Model

CS 465. Feistel Model. Last Updated: Aug 27, 2013. Feistel Cipher Structure. Described by Horst Feistel (IBM) in 1973 Many symmetric encryption algorithms use this structure DES, IDEA, Blowfish, RC6, MARS, Twofish Not AES Substitution-permutation network Block cipher

191 views • 6 slides