CompTIA Security Plus Mock Test Q1098

In PKI, a key pair consists of: (Select TWO).

A. A key ring
B. A public key
C. A private key
D. Key escrow
E. A passphrase


Correct Answer: B,C
Section: Cryptography

Explanation:
In a PKI the sender encrypts the data using the receiver’s public key. The receiver decrypts the data using his own private key. The key pair consists of these two keys.

Incorrect Answers:
A: There is no concept of key ring within a Public-Key Infrastructure.
D: A key escrow is not included in a PKI key pair.
Key escrow) is an arrangement in which the keys needed to decrypt encrypted data are held in escrow so that, under certain circumstances, an authorized third party may gain access
to those keys.
E: A PKI key pair contains two keys, and does not include a passhrase.
A passphrase is a sequence of words or other text used to control access to a computer system, program or data. Passphrases are particularly applicable to systems that use the
passphrase as an encryption key.

References:
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, pp. 140, 262, 279-285
http://en.wikipedia.org/wiki/Keyring_%28cryptography%29