TAILIEUCHUNG - Simple Des

Simple Des is a block cipher which encrypts an 9 bit block of plaintext using a 10 bit key and outputs an 8 bit block of Simple Des presents of structure of Simple Des; basic fuctions of Simple Des; crypanalysis of Simple Des and some things else.  | SIMPLE DES Simple DES is a block cipher which encrypts an 8-bit block of plaintext using a 10-bit key and outputs an 8-bit block of ciphertext. The encryption algorithm involves five functions executed in the following order 1. an initial permutation IP 2. a function fK 3. a switch function SW that switches two halves 4. the function IK again 5. the inverse IP-1 of permutation IP. Steps 2 and 3 use keys K1 and K2 resp. which are generated via a key generation algorithm. 1 KEY GENERATION Key generation involves three functions which are applied in a five step sequence in order to produce two subkeys 1. a permutation p 10 which permutes a 10-bit input 2. a left shift operation 3. an 8-bit permutation that produces an 8-bit output this gives the first subkey K1 4. again the output from step 2 is subjected to a second double left shift 5. an 8-bit permutation that produces a second 8-bit output this is the second subkey K2. Several alternatives could have been applied like either using a larger key or using two independent keys. 2 SIMPLE DES KEY

• An ninh - Bảo mật
• Simple Des
• Basic fuctions of Simple De
• Crypanalysis of Simple Des
• Block cipher
• Structure of Simple Des
• Encryption algorithm on key
• Báo cáo lâm nghiệp hay
• cách trình bày báo cáo
• báo cáo lâm nghiệp
• công trình nghiên cứu lâm nghiệp
• tài liệu về lâm nghiệp
• Random oracle model
• Public key encryption algorithm
• Random oracle
• Black box that responds
• Cryptographic practice
• Message recovery
• Digital signatures based on RSA
• Network security digital signature
• International Journal of Computer Networks and Communications Security
• The quantum cipher text space
• A superposition key
• The superposition state
• Quantum Encryption Algorithm
• The encryption algorithm
• Security key
• Symmetric key
• Public key
• Security algorithm
• Asymmetric encryption algorithm
• Key cryptography algorithm
• Algorithm cryptographic
• Algorithm ciphers ElGamal
• Algorithm signcription DSA
• System parameters