Overview#

Is SHA-2 Block Cipher with a 256-bit Message-Digest.

SHA256 (and most Secure Hash Algorithms) takes some bytes message that is run through the Hash Function

• it first pads the message Padded
• then breaks it up into chunks (Block Cipher)
• passes these chunks into what can best be described as a fancy "bit mixer"
  • that contains a number of bit shifts and binary operations orchestrated in a particular way

The results are properties that SHA256 offers

• creates a fixed-sized
• random-looking short digest of any variably-sized original message
• is non-reversible
• it is basically computationally impossible to construct a different message that hashes to any given digest (Collision Resistance).

More Information#

There might be more information for this subject on one of the following:

• Access Token Validation
• At_hash
• Base58Check
• Bitcoin address
• Bitcoin block
• Bitcoin network genesis block
• Certificate Fingerprint
• Channel Bindings for TLS
• Ciphers-SUITEB128ONLY
• Client Secret
• Code_challenge_method
• ES256
• Glossary Of LDAP And Directory Terminology
• HS256
• JWK-Thumbprint
• Kerberos Encryption Types
• Known Cipher Suites
• NSA Suite B Cryptography
• OAuth 2.0 JWT Secured Authorization Request
• PS256
• Padded
• Password Storage Scheme
• RIPEMD-160
• RS256
• SHA-1
• SHA-1 Deprecation
• SHA-2
• SUITEB128
• SUITEB192
• Secure Hash Algorithm

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• [#1] - A from-scratch tour of Bitcoin in Python - based on information obtained 2021-07-04