'Cbc mac' presentation slideshows

Message Authentication Codes (MACs) and Hashes

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Message Authentication Codes (MACs) and Hashes

743 views • 74 slides

David E. Culler University of California, Berkeley Arch Rock Corp. July 9-13, 2007

Wireless Embedded Systems and Networking Foundations of IP-based Ubiquitous Sensor Networks WSN Security. David E. Culler University of California, Berkeley Arch Rock Corp. July 9-13, 2007. * Much of this material based on work by David Wagner, UC Berkeley. cellphones. 1980.

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LECTURE 4 Data Integrity & Authentication Message Authentication Codes (MACs)

LECTURE 4 Data Integrity & Authentication Message Authentication Codes (MACs). Goal. Ensure integrity of messages, even in presence of an active adversary who sends own messages. Alice (sender). Bob (reciever). Fran (forger). Remark: Authentication is orthogonal to secrecy , yet

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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.

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Chapter 2 Advanced Cryptography (Part C)

Chapter 2 Advanced Cryptography (Part C). Message integrity Cryptanalysis. Message integrity. Parity bits and Hash functions have been used in protocols to detect modifications in streams of bits as they are passed from one computer to another To detect unintentional modifications .

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Security-and-Security-Architectural-Recommendations-for-the-802.15.4-Low-Rate-WPAN Date Submitted: [January 16, 2003] Source: [Rene Struik] Company [Certicom Corp.]

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

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Cryptography CS 555

Cryptography CS 555. Topic 14: CBC-MAC & Hash Functions. Outline and Readings. Outline CBC-MAC Collision-resistant hash functions Applications of MAC and hash functions Readings: Katz and Lindell: : 4.5,4.6. Basic CBC-MAC (secure for fixed-length messages).

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Lecture 5.1: Message Authentication Codes, and Key Distribution

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [AES Mode Discussion] Date Submitted: [15 May, 2002] Source: [Rene Struik] Company [Certicom Corp.] Address [5520 Explorer Drive, 4th Floor, Mississauga, ON Canada L4W 5L1]

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [AES Mode Discussion] Date Submitted: [15 May, 2002] Source: [Rene Struik] Company [Certicom Corp.] Address [5520 Explorer Drive, 4th Floor, Mississauga, ON Canada L4W 5L1]

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AES Mode Choices OCB vs. Counter Mode with CBC-MAC

AES Mode Choices OCB vs. Counter Mode with CBC-MAC. Niels Ferguson, MacFergus BV Russ Housley, RSA Labs Doug Whiting, HiFn. Introduction. 802.11i currently specifies AES-OCB for confidentiality and integrity Have concerns with this choice

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TinySec: Security for TinyOS

TinySec: Security for TinyOS. C. Karlof, N. Sastry, D. Wagner November 20, 2002. Goals of TinySec. Access Control Authorized participants only Integrity Altering and retransmitting a message should be difficult Confidentiality Transparent to applications and programmers. Block Ciphers.

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Authenticating with Block Ciphers

Authenticating with Block Ciphers. CS 470 Introduction to Applied Cryptography Instructor: Ali Aydin Selcuk. Message Authentication Codes (MAC). A keyed checksum of the message. Sender of a message m computes c = MAC K (M) and sends (M,c) to the receiver.

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SDLS Protocol Padding concept

SDLS Protocol Padding concept. Ignacio Aguilar Sanchez (ESA) CCSDS Spring Meeting 2010 | Portsmouth, VA. Padding description.

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