Lecture 02 Symmetric Cryptography

Feb 25, 2013

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NETE0519-ISEC0513. Outline. Overview of CryptographySymmetric CryptographyClassical Cryptographic TechniquesBlock Ciphers VS Stream CipherDES and 3DESAdvanced Encryption Standard (AES)Design of Symmetric CryptosystemsLocations of Encryption DevicesKey DistributionRandom NumbersProblems of

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Lecture 02 Symmetric Cryptography

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Network Security Principles, Symmetric Key Cryptography, Public Key Cryptography

Network Security Principles, Symmetric Key Cryptography, Public Key Cryptography. Modified by Xiuzhen Cheng Originally provided by Professor Rick Han (rhan@cs.colorado.edu) at the University of Colorado at Boulder. Network Security. Classic properties of secure systems: Confidentiality

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Symmetric Cryptography

2. Outline. Overview of Cryptosystem designCommercial Symmetric systemsDESAES (mention)Modes of block and stream ciphers. 3. Reading. Section 2.4-2.6 and 12.2 in Security in ComputingChapter 9 from Computer Science: Art and ScienceApplied Cryptography, Bruce Schneier. 4. Shannon's Guide to Goo

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Lecture 02 Symmetric Cryptography

Lecture 02 Symmetric Cryptography. Asst.Prof. Supakorn Kungpisdan, Ph.D. supakorn@mut.ac.th. Outline. Overview of Cryptography Symmetric Cryptography Classical Cryptographic Techniques Block Ciphers VS Stream Cipher DES and 3DES Advanced Encryption Standard (AES)

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Symmetric versus Asymmetric Cryptography

Symmetric versus Asymmetric Cryptography. Why is it worth presenting cryptography?. Top concern in security Fundamental knowledge in computer security A review for those who have taken the course Computer Security (and Integrity) A need for those who have not. Symmetric

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Symmetric Key Cryptography

Symmetric Key Cryptography. Secure communications Secure storage Computationally efficient Depends on a shared secret. Symmetric Key Cryptography. Alice and Bob want to communicate securely. Alice & Bob agree on a crypto algorithm Alice & Bob agree on a key

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Conventional Cryptography (Symmetric Ciphers)

Conventional Cryptography (Symmetric Ciphers). Outline. Stream Ciphers and Block Ciphers Confusion and Diffusion DES (Data Encryption Standard) Exhaustive Key Search Triple DES, DESX AES (Advanced Encryption Standard) Operation Modes. Symmetric Encryption.

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Introduction to Modern Cryptography Lecture 2 Symmetric Encryption: Stream

Introduction to Modern Cryptography Lecture 2 Symmetric Encryption: Stream & Block Ciphers. Stream Ciphers. Start with a secret key (“seed”) Generate a keying stream

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Symmetric Cryptography

CS461/ECE422 Spring 2012. Symmetric Cryptography. Outline. Commercial Symmetric systems DES AES Modes of block and stream ciphers. Reading. Chapters 2 and 20 from text. AES Standard issued as FIPS PUB 197 http://csrc.nist.gov/publications/fips/fips197/fips-197.pdf

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Symmetric cryptography: scalable matrix cipher

Symmetric cryptography: scalable matrix cipher . Nguyen Dinh Thuc University of Science, HCMC ndthuc@fit.hcmus.edu.vn. outline. M atrix-base cipher Advanced Encryption Standard Scalable Substitution Matrix cipher. Matrix-base cipher matrix cipher: introduction.

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Cryptography: Modern Symmetric Ciphers

Cryptography: Modern Symmetric Ciphers. INFSCI 1075: Network Security – Spring 2013 Amir Masoumzadeh. Outline. Last Week Why encryption? Provides protection Security services - confidentiality, authentication, integrity, non-repudiation Cryptography

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Symmetric cryptography

Symmetric cryptography. (Slides by Jaap-Henk Hoepman & Jeroen Doumen). Contents. Basics History Ciphers Attacks Hashing. Cryptology goals. Confidentiality Data integrity Authentication Non-repudiation. Cryptology. Cryptography The art of making Cryptanalysis The art of breaking.

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Lecture 02 Symmetric Cryptography 1

Lecture 02 Symmetric Cryptography 1. Dr. Supakorn Kungpisdan supakorn@mut.ac.th. Roadmap. Overview of Cryptography Types of Cryptography Symmetric Cryptography Classical Cryptographic Techniques Block Ciphers Modern Cryptographic Techniques. Basic Terminology.

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C HAPTER 12 Symmetric Key Cryptography

C HAPTER 12 Symmetric Key Cryptography.

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Lecture 03 Symmetric Cryptography 2

Lecture 03 Symmetric Cryptography 2. Dr. Supakorn Kungpisdan supakorn@mut.ac.th. Roadmap. Advanced Encryption Standard (AES) Design of Symmetric Cryptosystems Locations of Encryption Devices Key Distribution Problems of Symmetric Cryptography. Origins.

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symmetric key cryptography

symmetric key cryptography. tkkwon@snu.ac.kr. Symmetric Encryption. Classic ciphers also known as (AKA) single key Secret key sender and recipient share a common key was only type prior to invention of public-key cryptography until second half of 1970 ’ s. Symmetric Cipher Model.

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Symmetric Cryptography

Symmetric Cryptography. AES in depth. Replacing DES .

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Symmetric-key cryptography Vinod Ganapathy Lecture 2

Symmetric-key cryptography Vinod Ganapathy Lecture 2. Material from Chapter 2 in textbook and Lecture 2 handout (Chapter 8, Bishop’s book) Slides adapted from Matt Bishop. Overview. Classical Cryptography Cæsar cipher Vigènere cipher Next lecture: DES, Modular arithmetic. Cryptosystem.

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Applied Cryptography (Symmetric)

Applied Cryptography (Symmetric). Part I. Many savages at the present day regard their names as vital parts of themselves, and therefore take great pains to conceal their real names, lest these should give to evil-disposed persons a handle by which to injure their owners.

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Intro to cryptography: Symmetric Encryption

Intro to cryptography: Symmetric Encryption. Cryptography. Cryptography is quite old. Code breaking. Common strategies for breaking codes: Pattern analysis Frequency analysis Brute force Spying or exploiting other human factors

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Symmetric Cryptography

CS461/ECE422. Symmetric Cryptography. Outline. Overview of Cryptosystem design Commercial Symmetric systems DES AES Modes of block and stream ciphers. Reading. Section 2.4-2.6 and 12.2 in Security in Computing Chapter 9 from Computer Science: Art and Science

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Symmetric versus Asymmetric Cryptography

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