What is a hash algorithm? What are the common hashing algorithms?
- PHPzOriginal
- 2024-07-05 14:06:56954browse
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.
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