RSA public and private key generation, signature, encryption and decryption

RSA public and private key generation, signature, encryption and decryption Introduction

1. rsa encryption is an asymmetric encryption algorithm proposed by ron rivest, adi shamir and leonard adleman in 1977. rsa is the abbreviation of the last names of the three of them.

2. the rsa algorithm is one of the most widely used public key encryption algorithms at present, and its security is based on the difficulty of large-number decomposition.

3. characteristics of rsa encryption

(1) asymmetry: use different keys for encryption and decryption, the public key is used for encryption, and the private key is used for decryption.

(2) security: currently, it is believed that rsa encryption is secure as long as the key length is long enough (usually 2048 bits or more).

(3) flexibility: it can be used to encrypt small amounts of data, such as key exchange, digital signature, etc.

4. rsa encryption is widely used in fields such as secure communication, digital signatures and security authentication.