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 key, 8 verification bits.

4. 3DES Data Encryption Standard

Note: It is more secure than DES, but consumes three times of it.

5. Advanced AES 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. -- Selected

Sensitive but not confidential.

6. International Data encryption algorithms

IDEA is a group password that processes 64-bit arrays.

IDEA runs fast, but it is billed.

7. Understand the Blowfish algorithm

The block cipher algorithm is a 64-Bit Array. The key length can be 448 bits. The ciphertext is obtained after 16 rounds of encryption functions.

8. Understand RC4

One of the commonly used stream passwords is used for SSL, and 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,

Analytics from 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

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