SHA-256
SHA-256 is a cryptographic hash function used to generate a 256-bit hash value from a given input. It is one of the most secure hashing algorithms available and is used in many applications, including digital signatures and message authentication codes (MACs). SHA-256 is also used in the Bitcoin protocol to ensure the integrity of transactions.
History of SHA-256
SHA-256 was developed by the National Security Agency (NSA) in 2001 as part of the SHA-2 family of cryptographic hash functions. It was designed to replace the older SHA-1 algorithm, which had become vulnerable to attack. SHA-256 is a one-way function, meaning that it is not possible to reverse the process and obtain the original input from the generated hash value.
SHA-256 is used in many applications, including digital signatures and message authentication codes (MACs). It is also used in the Bitcoin protocol to ensure the integrity of transactions. SHA-256 is considered to be one of the most secure hashing algorithms available.
Comparison of SHA-256 and SHA-1
| Algorithm | Hash Length | Security Level |
|---|---|---|
| SHA-256 | 256 bits | High |
| SHA-1 | 160 bits | Low |
Summary
SHA-256 is a cryptographic hash function used to generate a 256-bit hash value from a given input. It is one of the most secure hashing algorithms available and is used in many applications, including digital signatures and message authentication codes (MACs). SHA-256 is also used in the Bitcoin protocol to ensure the integrity of transactions. For more information about SHA-256, please visit the Wikipedia page.
See Also
- SHA-1
- SHA-2
- Cryptographic Hash Function
- Digital Signature
- Message Authentication Code (MAC)
- Bitcoin Protocol
- Cryptography
- Cryptanalysis
- Hash Function
- Secure Hashing Algorithm (SHA)
