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Cryptographic Signature

    A cryptographic signature is a digital fingerprint that allows someone to verify the authenticity of a message, document, or transaction. Cryptographic signatures use public-key cryptography, which involves two keys: a private key (known only to the individual who owns it) and a public key (shareable with anyone). Creating a cryptographic signature requires the individual to create a hash of the data to be signed. This hash value is combined with their private key using a digital signing algorithm (DSA). The resulting value—called a signature—can be verified by anyone with access to both the original data and the signer’s public key.