Input Text
SHA-256 Hash
Frequently Asked Questions
What is SHA-256?
SHA-256 is a cryptographic hash function that generates a 256-bit (64 hexadecimal characters) hash value. It's part of the SHA-2 family and is widely used for data integrity verification and digital signatures.
Is SHA-256 secure?
SHA-256 is currently considered cryptographically secure and has no known practical collision vulnerabilities. It's used in blockchain technology, SSL certificates, and various security applications.
Can the same input produce different SHA-256 hashes?
No, the same input will always produce the exact same SHA-256 hash. Even minor changes in input result in dramatically different hash values, a property known as the avalanche effect.
Can SHA-256 hashes be reversed?
No, SHA-256 is a one-way function. It's computationally infeasible to determine the original input from its hash value. This one-way property is essential for its security applications.