Digital Signature Using SHA-256 with RSA Encryption.
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Summary
A digital signature is a crucial component of cryptography, enabling the verification of the authenticity of a message and the integrity of the data.
SHA-256, a hash function, produces a unique, fixed-length string based on the input data, and RSA encryption is used to encrypt the hash, which is signed with the sender’s private key.
Upon receipt of a message and its signature, the recipient uses the sender’s public key to decrypt the signature, revealing the original hash.
The recipient then hashes the original data using SHA-256 again.
If the resulting hash matches the decrypted signature hash, the data is confirmed to be authentic and unaltered, ensuring secure communication.