'Des key schedule' diaporamas de présentation

Symmetric Encryption Algorithms

574 views • 42 slides

Symmetric Encryption Algorithms

637 views • 40 slides

Symmetric Encryption Algorithms

Symmetric Encryption Algorithms. Symmetric Cipher Model. Plaintext Encryption Algorithm Secret Key (known to sender and receiver) Ciphertext Decryption Algorithm. Secret Key. Secret Key. Plaintext Message. Encryption Algorithm. Decryption Algorithm. Plaintext Message.

490 views • 40 slides

DES Algorithm

DES Algorithm. Provides Confidentiality. Conventional Encryption Algorithms. Data Encryption Standard (DES) The most widely used encryption scheme The algorithm is reffered to the Data Encryption Algorithm (DEA) DES is a block cipher The plaintext is processed in 64-bit blocks

2.08k views • 35 slides

Cryptography and Network Security Chapter 3

Cryptography and Network Security Chapter 3. Fourth Edition by William Stallings Lecture slides by Lawrie Brown. Modern Block Ciphers. now look at modern block ciphers one of the most widely used types of cryptographic algorithms provide secrecy /authentication services

406 views • 25 slides