When using a digital signature for the process of authentication, the sender encrypts the message with their private key and the recipient decrypts the message with the sender's public key.

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Digital signatures work by having the sender encrypt a hash of the message with their private key. The recipient then decrypts this hash with the sender's public key to verify the message's integrity and authenticity, ensuring it was indeed sent by the holder of the private key and has not been altered.

When Using a Digital Signature for the Process of Authentication