'Counter mode' presentation slideshows

Lecture 5 Block Diagrams Modes of Operation of Block Ciphers

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Chapter 4 Modes of Operation

Chapter 4 Modes of Operation. Instructor: ??? hmsun@cs.nthu.edu.tw Room: EECS 6402, Tel:03-5742968, Fax : 886-3-572-3694. Encrypting a Large Message. There are several schemes defined in [DES81] to encrypt a message larger than 64 bits. Electronic Code Book (ECB) Cipher Block Chaining (CBC)

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Network Security

Network Security. Lecture 4 Modes of Operation http://web.uettaxila.edu.pk/CMS/coeCCNbsSp09/index.asp. Waleed Ejaz waleed.ejaz@uettaxila.edu.pk. Overview. Modes of Operation: ECB, CBC, OFB, CFB, CTR Privacy + Integrity DES Attacks 3DES and its design Ref: Chapter 4 of textbook.

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Timers and Event Counters

Timers and Event Counters. Lecture 13. In These Notes. We learn the basics of the Timer/Counter peripheral Called timers by Renesas We examine how to set up the timers for different operation: Timer mode Event counting mode Pulse Width Modulation (PWM) mode One-shot timer mode

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Towards the Issues in Architectural Support for Protection of Software Execution

Towards the Issues in Architectural Support for Protection of Software Execution. Weidong Shi Hsien-Hsin (Sean) Lee Mrinmoy Ghosh Chenghuai Lu School of Electrical and Computer Engineering Georgia Institute of Technology. Content. Motivation

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Janus Optimizing Memory and Storage Support for Non-Volatile Memory Systems

Janus Optimizing Memory and Storage Support for Non-Volatile Memory Systems. Sihang Liu Korakit Seemakhupt , Gennady Pekhimenko , Aasheesh Kolli , and Samira Khan. BACKGROUND. The new non-volatile memory (NVM) is High-speed Persistent Byte-addressable

268 views • 26 slides

PRPs and PRFs

PRPs and PRFs. Abstract ciphers: PRPs and PRFs, Security models for encryption, Analysis of CBC and counter mode. CS255 : Winter 2008. Dan Boneh, Stanford University. PRPs and PRFs. Pseudo Random Function ( PRF ) defined over (K,X,Y): F: K ? X ? Y

459 views • 24 slides

PRPs and PRFs

PRPs and PRFs. Abstract ciphers: PRPs and PRFs, Security models for encryption, Analysis of CBC and counter mode. CS255 : Winter 2007. Dan Boneh, Stanford University. PRPs and PRFs. Pseudo Random Function ( PRF ) defined over (K,X,Y): F: K ? X ? Y

337 views • 24 slides

PRPs and PRFs

PRPs and PRFs. Abstract ciphers: PRPs and PRFs, Security models for encryption, Analysis of CBC and counter mode. CS255 : Winter 2007. Dan Boneh, Stanford University. PRPs and PRFs. Pseudo Random Function ( PRF ) defined over (K,X,Y): F: K ? X ? Y

248 views • 24 slides

PRPs and PRFs

PRPs and PRFs. Abstract ciphers: PRPs and PRFs, Security models for encryption, Analysis of CBC and counter mode. CS255 : Winter 2008. Dan Boneh, Stanford University. PRPs and PRFs. Pseudo Random Function ( PRF ) defined over (K,X,Y): F: K ? X ? Y

243 views • 24 slides

Module IV Chapter 15

Module IV Chapter 15. IEEE 802.11 Wireless LAN Security. BACKGROUND. There are two types of WLANs Ad hoc networks- here, stations communicate directly. 2. Infrastructure WLANs- Uses Access Points (APs). Stations first sends frame to AP, then AP delivers the frame to final destination.

247 views • 24 slides

16F877A

16F877A. Timer 0. The Timer0 module timer/counter has the following features: 8-bit timer/counter Readable and writable 8-bit software programmable prescaler Internal or external clock select Interrupt on overflow from FFh to 00h Edge select for external clock

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Improving Cost,

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Modes of Operation

Modes of Operation. How to encrypt large messages using block ciphers. Large messages. In order for encryption to be cost-efficient, a key K should be used to encrypt data of total size much larger than K .

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Xiuzhen Cheng cheng@gwu

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Xiuzhen Cheng cheng@gwu

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Block cipher and modes of encryptions

Block cipher and modes of encryptions. Block cipher. Other name for fixed-length encryption scheme. Problem with just encrypting each block of the message using a randomized encryption scheme. Each block uses k bits of randomness If we have blocks, it requires bits of randomness.

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Timer 1

Timer 1. INTCON Register. The INTCON Register is a readable and writable register, which contains various enable and flag bits for the TMR0 register overflow, RB Port change and External RB0/INT pin interrupts. PIE1 Register.

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IPsec Enhancements for High Speed Networks

IPsec Enhancements for High Speed Networks. Stephen Kent. Current Constraints. Sequence number space exhaustion Encryption performance Integrity (and authentication) performance. Sequence Number Exhaustion.

168 views • 6 slides