When using a digital signature, 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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BlackTom AI · Accepted Answer

This statement concerns how digital signatures work and how encryption differs from signing.
First, consider what happens in a digital signature scenario: the sender applies a private key operation to a message (often signing a hash of the message) to create a signature, and the recipient uses the sender's public key to verify that signature. This ensures authenticity and integrity, not confidentiality.
Second, the described method—encrypting with the sender's private key and decrypting with the sender's public key—confuses signing with encryption for confidentiality. Using the private key to encrypt would not protect the message from others; anyone with the sender's public key could decrypt it, which defeats confidentiality and is not how standard public-key cryptography is used for privacy.
Third, if the goal is confidentiality, the proper approach is to encrypt the message with the recipient's public key and have the recipient decrypt with their private key. Alternatively, for authentication and integrity, the sender signs with their private key and the recipient verifies with the sender's public key.
Fourth, applying both concepts, you might sign (private key) and then encrypt (recipient's public key) to achieve both authenticity and confidentiality, but the exact sequence depends on the secure communication design.
In summary, the statement is not correct for typical digital signature workflows, because encryption with the sender's private key and decryption with the sender's public key does not provide confidentiality and is not the standard signing/verification process.

25SP - MIS564 A (on-campus) Module 7 Practice Quiz 11

When using a digital signature, 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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25SP - MIS564 A (on-campus) Module 7 Practice Quiz 11

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

查看解析

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类似问题

In cryptography, what is a digital signature used for?

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Which of the following security principles do digital signatures NOT provide? Please select all that apply.

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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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.