Final answer:
The statement regarding digital signatures is true, as they provide a way to sign documents that ensures both authenticity and integrity using cryptographic techniques. They are created with the sender's private key and verified using the sender’s public key, thus revealing any unauthorized alterations.
Step-by-step explanation:
The statement is true. A digital signature is indeed a method to sign a document in such a way that the recipient can verify the authenticity and integrity of the document. It ensures that the document came from the purported originator (authenticity) and that it has not been altered in transit (integrity).
Digital signatures employ cryptographic techniques. Such a signature is created using the sender's private key, which is part of a cryptographic algorithm, and can be verified by the recipient using the sender's public key. The verification process involves checking the digital signature against the sender's public key and the contents of the document to ensure they match.
Because digital signatures involve encryption and a set of mathematical algorithms, they can be considered a cryptographic proof of authorship and document integrity. If the contents of the document were altered after the signature was applied, the verification process would fail, alerting the recipient to potential tampering.