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. TRANSPOSITION TECHNIQUES . NETWORK DEVICE SECURITY NETWORK HARDENING, DIGITAL VIDEO DATA SIZING AND OBJECT BASED ANIMATION, Mining single dimensional boolean association rules from transactional, No public clipboards found for this slide. Classical Encryption Techniques 2 A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. This technique is referred to as a transposition cipher. Classical Encryption Techniques 1 Symmetric-key algorithms are algorithms for cryptography that use the same cryptographic keys for both encryption of plaintext and decryption of ciphertext. Fourth Edition ; by William Stallings ; Lecture slides by Lawrie Brown (Modified by Prof. M. Singhal, U of Kentucky) 2 Symmetric Encryption. Public key encryption algorithm uses pair of keys, one of which is a secret key and one of which is public. See our Privacy Policy and User Agreement for details. 2 Outline • Introduction • Symmetric Cipher Model • Substitution Techniques • Transposition Techniques • Rotor Machines • Steganography. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Unit : I Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. •In a modern block cipher (but still using a classical encryption method), we replace a block of N bits from the plaintext with a block of N bits from the ciphertext. Hashing. See our Privacy Policy and User Agreement for details. Cryptography is the technique which is used for doing secure communication between two parties in the public environment where unauthorized users and malicious attackers are present. 2. 3. Topic : Classical Encryption Techniques • 1. symmetric ciphers • 2. variety of algorithms 4. In terms of security, hashing is a technique used to encrypt data and generate unpredictable hash values. It remains by far the most widely used of the two types of encryption. If you continue browsing the site, you agree to the use of cookies on this website. Class : II MSc., CS These two keys are mathematically linked with each other. Winner of the Standing Ovation Award for “Best PowerPoint Templates” from Presentations Magazine. 2/15/20191. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Now customize the name of a clipboard to store your clips. OUTPUT: The block length of an encryption/decryption key. Classical Encryption Techniques in Network Security. Cryptographic Techniques: Plain Text and Cipher Text, Substitution Techniques, Transposition Techniques, Encryption and Decryption, Symmetric and Asymmetric Key Cryptography, Steganography, Key Range and Key Size, Possible Types of Attacks. View 2-Classical Encryption.ppt from CSE 651 at JK Lakshmipat University. Three important characteristic of this problems 1. Clipping is a handy way to collect important slides you want to go back to later. Symmetric Encryption,Cryptographic Systems,Encryption Scheme Security,Substitution Technique,Transposition Techniques ,Rotor Machines. 1. Introduction to Classical Cryptography by Noted Textbook Author: This overview includes information on how classical cryptography techniques relate to the modern day. Classical Techniques are based on two building blocks ; Substitution The letters of plaintext are replaced by other letters or by numbers or symbols. Theni. Chapter 2 – Classical Encryption Techniques Many savages at the present day regard their names as vital parts of themselves, and therefore View ch02.ppt from CSE 402 at JK Lakshmipat University. Classical Encryption Techniques Information System Security Lecture 1 Classical encryption techniques • As (In general, though, N is set to 64 or multiples thereof.) Classic Encryption Techniques All encryption techniques are based on 2 methods, which can be used separately or together: 1- Substitution 2- Transposition 1- Substitution Encryption Techniques: Substitution is an encryption technique where elements in the plaintext are replaced or mapped with another elements. Plaintext encrypted two letters at a time ; If a pair is a repeated letter, insert a filler like 'X', ex: “Communication" encrypts as “Com x munication" If the letters appear on the same row of your table, replace them with the letters to their immediate right respectively (wrapping around to the left side of the row if a letter in the original pair was on the right side of the row). In cryptography there are two processes i.e. Bon Secours College For Women There are two requirements for secure use of conventional encryption: 1. See our User Agreement and Privacy Policy. polyalphabetic cipher techniques have the following features in common: A set of related monoalphabetic substitution rules is used. Classical Encryption Techniques - Title: Classical Encryption Techniques Author: lai Last modified by: Steve Lai Created Date: 9/9/2008 7:19:38 PM Document presentation format: On-screen Show (4:3) | PowerPoint PPT presentation | free to view You can change your ad preferences anytime. Symmetric encryption ; Secret key encryption ; Shared key encryption ; 2 Symmetric Encryption. Network Security Classical Encryption Techniques. Title: Chapter 2: Classical Encryption Techniques 1 Chapter 2 Classical Encryption Techniques. M.Ramya, Cryptography & Network Security: 3.Classical Encryption Techniques Caesar Cipher Fig 2.4 : brute-force cryptanalysis - Simply try all the 25 possible keys. Classical Encryption Techniques - Title: Classical Encryption Techniques Author: lai Last modified by: Steve Lai Created Date: 9/9/2008 7:19:38 PM Document presentation format: On-screen Show (4:3) | PowerPoint PPT presentation | free to view They'll give your presentations a professional, memorable appearance - the kind of sophisticated look that today's audiences expect. Name of the Staff : M.FLORENCE DAYANA M.C.A.,M.Phil.,(Ph.D)., View lecture 2(first).ppt.pptx from COMPUTER I 151001320 at The Hashemite University. A key determines which particular rule is chosen for a given transformation. Ads and to provide you with relevant advertising is a handy way collect!, substitution technique is referred to as a Transposition Cipher kind of mapping is achieved by performing some sort permutation. 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