312-50V13 · Question #199
312-50V13 Question #199: Real Exam Question with Answer & Explanation
The correct answer is C: Public keys. Public keys (C) are the keys that are shared during encryption and decryption processes. In asymmetric (public-key) cryptography, a sender uses the recipient's public key to encrypt a message, which can only be decrypted using the recipient's corresponding private key - making it
Question
During the process of encryption and decryption, what keys are shared?
Options
- APrivate keys
- BUser passwords
- CPublic keys
- DPublic and private keys
Explanation
Public keys (C) are the keys that are shared during encryption and decryption processes. In asymmetric (public-key) cryptography, a sender uses the recipient's public key to encrypt a message, which can only be decrypted using the recipient's corresponding private key - making it safe to share the public key openly with anyone.
Why the other options are wrong:
- (A) Private keys are never shared; they are kept secret by the owner, as exposing them would compromise all encrypted communications.
- (B) User passwords are authentication credentials, not cryptographic keys used in the encryption/decryption process itself.
- (D) Public and private keys is incorrect because while both keys are used in the process, only the public key is shared - the private key remains confidential.
Memory tip: Think of a public key like a padlock that anyone can use to lock (encrypt) a message, while the private key is the unique key only you possess to unlock (decrypt) it - you'd freely hand out padlocks, but never give away your key! 🔒
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