'Message block' diaporamas de présentation

Lesson 7: CAMS

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Information Security and Management 11. Message Authentication and Hash Functions

Information Security and Management 11. Message Authentication and Hash Functions. Chih-Hung Wang Sep. 2008. Message Authentication. Authentication Requirement Possible attacks on the network Disclosure Traffic analysis Masquerade Content modification Sequence modification

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Cryptography

Cryptography. CS 472 Fall 2006 . What is Cryptography?. Encrypting data so that unauthorized users cannot know the contents Purpose: Encryption of messages/data Integrity checking (Has the content been changed?) Authentication (Who had sent the message/data?).

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Lecture 3 RTL Design Methodology Transition from Pseudocode & Interface

Lecture 3 RTL Design Methodology Transition from Pseudocode & Interface to a Corresponding Block Diagram. Structure of a Typical Digital System. Data Inputs. Control & Status Inputs. Control Signals. Datapath ( Execution Unit ). Control ler (Control Unit ). Status Signals.

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Group Members

Group Members. Muhammad Nisar (1421-112085) Muhammad Raza (1421-211007) Tayyab Orangezaib (1421-311067). Data Link Protocol. Synchronous protocol Character-Oriented protocol Bit-Oriented protocol Binary synchronous message block. Data Link Protocol.

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Hashes and Message Digest

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O2D EIP through Micrologix 1400

O2D EIP through Micrologix 1400. O2D must have firmware 1047 or higher for Ethernet IP communication Object Recognition Software version 3.5 This example assumes that you will use an Ethernet IP trigger . Explicit messaging is used in this process. Requirements.

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O2D EIP through Micrologix 1400

O2D EIP through Micrologix 1400. O2D must have firmware 1047 or higher for Ethernet IP communication Object Recognition Software version 3.5 This example assumes that you will use an Ethernet IP trigger . Explicit messaging is used in this process. Requirements.

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Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

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Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

187 views • 9 slides

Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

212 views • 9 slides

Modes of Operation

Modes of Operation. CS 795. Electronic Code Book (ECB). Each block of the message is encrypted with the same secret key Problems: If two identical blocks are in the same message, cipher text would be identical. Cipher blocks can be rearranged to alter the message. Cipher Block Chaining (CBC).

163 views • 9 slides