• This P-box is a straight permutation, and the resulting number of XOR-ed with the left half of the input block, with which we have since the beginning of this round.
• Block cipher, 64 bits per block 64-bit key, with only 56 bits effective ECB and CBC mode.
• Wayne.
• OF the Features.
• DES – Design Proves Good: 12 DES – Design Proves Good recent analysis has shown despite this that the choice was appropriate and is well designed..
• Burleson source: Network Security Essentials Chapter 2: Symmetric encryption PPT presentation summary: Network Security Essentials Chapter 2: Symmetric encryption.
• Round) is the last of the left half.
• This goes on for 16 rounds, but after the last round the left and right halves are not swapped, so that the result of the 16 rounds, the final right half, and the result of the 15th round (which is the left half of the 16th century.
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• Source: Advanced Encryption Standard For Smart Card Security PPT presentation summary: Advanced Encryption Standard For Smart Card Security Aiyappan Natarajan, David Jasinski Kesava upuru Lilian Atieno supervisor: Prof.
• Round function F …

Data Encryption Standard (DES) source: AES encryption – Clemson University PPT presentation summary: the story.

### Comparative Analysis of AES and DES security

19 S-Box 1 Substitution Box 1 S-Box 2 Substitution Box 2 20 S-Box-3-Substitution-Box 3 S-Box 4 Substitution Box 4, 21 S-to do Box-5 Substitution Box 5 S-Box 6 Substitution Box 6 22 S-Box 7 Substitution Box 7 S-Box 8 Substitution Box 8 23 Feistel function – Permutation To the substitution permutation is completed after the P-box Permutation P 24 OF the core function After a round of the Feistel function, the buffer is XORed with L, always the next R Previous R the next L will Repeat the above mentioned operations are reversed to be 16 times 25 OF the Core function in The 16-lap finish, L and R, and mixed, then a 64-bit-pre-output to Use IP-1 to the last digit output 26 OF the decryption, Almost all the operations are the same as those of encryption, Just a different use of the subkeys in descending order 27 Other Form OF Triple-DES-literally. Whether your application is business, how-to, education, medicine, school, Church, sales, marketing, online training or just for fun powershow.com a great resource. Or you can use to find and download high-quality how-to PowerPoint ppt presentations with illustrated or animated slides that will teach you how to do something new, also for free. We will also be embedded convert your presentations and slide shows into the universal Flash format with all their original multimedia glory, including animation, 2D and 3D transition effects, embedded music or other audio or even video-in slides.. The DES algorithm (Data Encryption Standard Most widely used in the world of the Basic algorithm Developed in the triple-des. Its purpose is to provide a standard method for protecting sensitive commercial and unclassified data. The S-box permutations: 32 S-box permutation S-boxes are a little different than the other permutations. While you download, if you can’t download for some reason, a presentation, have deleted the publisher may be the file of your server. In addition to the n-th block to the n-th S-box. In the expansion to 1.5 times its size, several bits are repeated (no new bits can be shifted introduced, all the existing bits, and some of them are double). Again, the message is divided into 64-bit blocks, but they are operating in the encryption with IV

#### The DES encryption algorithm in Technology

OF the permutations: 40 OF permutations On the initial Permutation OF the chip, a 64-bit block loads a bit at a time (this is very slow in software). We must provide a way for you to use in practice, since we encrypt rule, any amount of information. A final permutation, the inverse of IP the Details of Each Iteration: 17 Details of Each Iteration OF the Swapping of the Left and Right halves: 18 – Swapping the Left and Right halves of The 64-bit block is broken enciphered is in two halves. in the 1970s by the National Bureau of Standards (NBS)with the help of the National Security Agency (NSA) 8 OF the S-boxes: 33 8 DES S-boxes the S-box permutations: 34 S-box permutations S1 Box truth table: 35 S1 Box in the truth table, the 8, The OF S-boxes: 36 8 OF the S-boxes OF the Operation – P Box: 37 OF the Operation – the P-Box, The output of each of the 8 S-boxes are concatenated to form a 32-bit number, which is then permutated with a P-box. Permutation function on the P-Box: 38 Permutation function on the P-Box OF the permutations: 39 OF the permutations of The first and final permutations in DES serve no cryptographic function. Several iterations OF the story: 7 THE story of The Data Encryption Standard (DES). The left half and the right half goes through one OF the round, and the result becomes the new right half. Each Iteration Uses a Different Sub-key: 21, Each Iteration Uses a Different Sub-key DES works on 64-bit data at a time. THE use of materials in the industry: a 10-OF – use in the industry One of the largest users of of the the banking sector, particularly with EFT, and EFTPOS.. THE key-processing: the 22-DES key processing the key is usually stored as a 64-bit number, where every eighth bit is a parity bit. With over 30,000 presentation design templates to choose from, crystal graphics offers more professionally-designed s and templates with stylish backgrounds and designer layouts than anyone else in the world. THE basics: 13 THE – basics uses the two basic techniques of cryptography – confusion and diffusion. Lecture slides by Lawrie Brown source: Cryptographic systems – Weber State University PPT presentation summary: Each encryption method uses a special algorithm. DES – Swapping of Left and Right halves: 19 OF Swapping the Left and Right halves of This can be described functionally as. The Key Schedule: 24 The Key-Schedule The key by the key list consists of used, which are formed from the round of 16, the