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Digital Signature

Digital Signature is an authentication mechanism tha enable the creator of a message to attach a code that act as a signature. Digital Signature is formed by taking the hash of the message and encrypting the message with the creator’s private key. Digital Signature grantees the source and integrity of the message. Digital Signature is a public key technique but it cannot be used for encryption or key exchange. Digital Signature Properties 1- It must verify the author and the time and the date of the signature.
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