Cryptography and Identity Authentication Technology-principles and practical applications of PKI & lt; 2 & gt;

Understand and deploy symmetric encryption 1. Prepare the symmetric encryption software FatCryptoTool and office Password Recovery to crack the office Password. 2. symmetric encryption system: dedicated encryption, fast and efficient. 3. Data Encryption Standard DES: Lucifer -- "DEA --" ASNI features: 56-bit valid keys and 8 parity bits. 4. 3DES Data Encryption Standard Note: it is more secure than DES, but consumes three times of it. 5. AES Advanced Encryption Standard AES is a group password that supports 128,192,256-bit keys. · MARS: Developed by the Lucifer algorithm team developed by IBM. · RC6: Developed by the RSA lab. · Serpent: Developed by Ross Anderson, ELi Biham, and Lars Kndsen. · Twofish: Developed by Counterpans System. · Rijndeal: Developed by Joan Daemen and Vincent Rijmen. -- Select sensitive but not confidential. 6. IDEA, an international data encryption algorithm, is a group password that processes 64-bit arrays. IDEA runs fast, but it is billed. 7. Understand the Block Cipher Algorithm of the Blowfish algorithm. It is a 64-Bit Array. The key length can be 448 bits. After 16 rounds of encryption functions, the ciphertext is obtained. 8. Understand one of the common RC4 traffic passwords for SSL. The key length is variable. The algorithm is simple, fast, and effective. 9. Understand the RC5 group password. Its parameters, block size, key length, and running wheel count are also variable. Designed by Ron Rivest and analyzed by RSA Data security companies. Supports 32, 64, and 128 bits, and the key length can be 2048 bits. 255 rounds of operation. FatCryptoTool is easy to use: 1. Download 2. Open 3. Add resources 4. Encryption