When receiving a document that has been digitally signed, you can test to ensure that the document was _________ and the _________ was who you expected it to be sent from.

Question

BlackTom AI · Accepted Answer

The prompt asks about testing a digitally signed document to verify two things: that the document has not been altered, and that the signature came from the expected source.
Option 1: 'modified, sender' suggests the document was changed and claims it came from the sender. This directly contradicts the purpose of a digital signature, which is to detect modifications. Therefore this choice is incorrect.
Option 2: 'not modified, creator' implies the document is intact but asserts the signer is the creator. While TOC terminology could be relevant in some contexts, the common objective with digital signatures is to verify the sender (identity) as well as integrity. The option uses 'creator' instead of 'sender,' making it imprecise and thus incorrect in this context.
Option 3: 'modified, creator' asserts both modification and that the signer is the creator. This is inconsistent with the fundamental role of a digital signature, which is to detect tampering and confirm the sender, so this is incorrect.
Option 4: 'not modified, sender' states the document has not been altered and that the signature comes from the expected sender. This aligns with the core assurances provided by digital signatures: integrity (no modification) and authenticity (correct sender), making this the correct choice.
In summary, the essential checks provided by digital signatures are integrity and authenticity, which correspond to 'not modified' and 'sender' respectively. The other options mix in terms like 'modified' or 'creator,' which do not match the standard verification goals for digitally signed documents.

IS 4470-001 Spring 2025 IS 4470-090 Exam 1

When receiving a document that has been digitally signed, you can test to ensure that the document was _ and the _ was who you expected it to be sent from.

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