fingerprint
SHA-1 Hash
Calculate SHA-1 hash for data integrity verification. Produces a 160-bit hash value.
Input
Enter text to generate SHA-1 hash
0 characters0 bytes
SHA-1 Hash
160-bit (40 hex characters)
fingerprint
Enter text above to generate hash
Hash Properties
memory
Output Size160 bits (20 bytes)
speed
Block Size512 bits
repeat
Rounds80
warning
SecurityDeprecated for security
About SHA-1
SHA-1 (Secure Hash Algorithm 1) produces a 160-bit hash value. It was once the most widely used hash function but has been deprecated for security-sensitive applications due to theoretical and practical collision attacks demonstrated in 2017.
- Produces a 40-character hexadecimal string
- Still used in Git for commit identification
- Not recommended for digital signatures or certificates
- SHAttered attack demonstrated practical collision in 2017
- Use SHA-256 or SHA-3 for security applications