SY0-301 · Question #181
Which of the following BEST describes part of the PKI process?
The correct answer is D. User1 encrypts data with User2's public key. In PKI, encrypting data with the recipient's public key ensures only they can decrypt it using their matching private key - this is the foundation of asymmetric encryption.
Question
Which of the following BEST describes part of the PKI process?
Options
- AUser1 decrypts data with User2's private key
- BUser1 hashes data with User2's public key
- CUser1 hashes data with User2's private key
- DUser1 encrypts data with User2's public key
How the community answered
(40 responses)- B5% (2)
- C3% (1)
- D93% (37)
Why each option
In PKI, encrypting data with the recipient's public key ensures only they can decrypt it using their matching private key - this is the foundation of asymmetric encryption.
Decryption is done with the key owner's own private key, not someone else's private key - private keys are never shared.
Hashing is a one-way operation that does not involve public keys; hashing and encryption are distinct cryptographic processes.
Signing (not encrypting) involves a private key, but applying a hash with a private key describes digital signature creation, not PKI data encryption.
When User1 wants to send confidential data to User2, User1 encrypts it using User2's public key. Because the public and private keys are mathematically paired, only User2's private key can decrypt what was encrypted with User2's public key. This ensures confidentiality in transit.
Concept tested: PKI asymmetric encryption with public key
Source: https://learn.microsoft.com/en-us/windows/security/identity-protection/smart-cards/smart-card-how-smart-card-sign-in-works
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