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Ann and Peter are Business partners. Ann is sending an urgent contract to Peter. There is no time to sign the contract and send it back per normal mail. So Peter decides to sign the document and send it back per E-Mail. To provide authenticity he decides to use a digital signature. Which key must he choose to sign the message.
His private key.
His public key.
Anns public key.
Anns private key.
To digitaly sign a document you have to use your private key. Everyvone can then use your public key to verify the signature.
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