What is a hash algorithm? What are the common hashing algorithms?

Hash algorithm is a mathematical function that converts input data into a fixed-length hash value and is used to detect data integrity and uniqueness. Common hashing algorithms include: MD5, SHA-1, SHA-256, SHA-512, bcrypt, and PBKDF2.

What is a hashing algorithm?

A hash algorithm is a mathematical function that converts input data into a fixed-length output (hash value). It utilizes the idea of ​​collision, that is, different input data may produce the same hash value, thereby effectively detecting data integrity and uniqueness.

Common hashing algorithms

There are many common hashing algorithms, here are a few of them:

• MD5 (Message Digest 5): Widely used in file integrity verification, digital signatures and other scenarios , output a 128-bit hash value.
• SHA-1 (Secure Hash Algorithm 1): Enhance the security of MD5 and output a 160-bit hash value.
• SHA-256 (Secure Hash Algorithm 256): An upgraded version of SHA-1, which is more secure and outputs a 256-bit hash value.
• SHA-512 (Secure Hash Algorithm 512): An extended version of SHA-256, providing higher security and outputting a 512-bit hash value.
• bcrypt: A password hash function specially used to store passwords and has high resistance to brute force cracking.
• PBKDF2 (Password-Based Key Derivation Function 2): A key derivation function used to generate encryption keys from passwords.

The above is the detailed content of What is a hash algorithm? What are the common hashing algorithms?. For more information, please follow other related articles on the PHP Chinese website!