What are symmetric passwords and asymmetric passwords? The characteristics and application fields of these two cryptosystems are analyzed.

1. Definition: The information can be encrypted and decrypted at the same time with the same key. This encryption method is called symmetric encryption, also known as single key encryption.

2. Features: open algorithm, small amount of calculation, fast encryption speed and high encryption efficiency.

3. Application field: Symmetric encryption is usually used when the message sender needs to encrypt a large amount of data because of its high speed.

Second, the password is wrong.

1. Definition: Asymmetric password refers to the password used in asymmetric cryptosystem.

2. Features:

(1) Encryption key and decryption key are different, so it is difficult to push each other.

(2) One key is public, that is, the public key, and the other key is secret, that is, the private key.

3. Application field: The problem of key distribution and management is well solved, and digital signature can also be realized.

Extended data

Characteristics of symmetric encryption algorithm

1. The encryption party and the decryption party use the same key;

2. The encryption and decryption speed is relatively fast, which is suitable for long data;

3. The key transmission process is unsafe and easy to be cracked, and the key management is also troublesome.

Baidu encyclopedia-asymmetric password

Baidu Encyclopedia-Symmetric Encryption