Which of the following is used to authenticate asymmetric keys? (ISC)2 CISSP-ISSAP Exam

The correct answer is A. Digital signature. Digital signatures authenticate asymmetric keys by using a trusted third party (Certificate Authority) to cryptographically bind a public key to an identity - when you receive someone's public key embedded in a certificate, the CA's digital signature on that certificate proves th

Identity and Access Management (IAM) Architecture

Question

Options

ADigital signature
BMAC Address
CDemilitarized zone (DMZ)
DPassword

How the community answered

(34 responses)

A
91% (31)
B
6% (2)
C
3% (1)

Explanation

Digital signatures authenticate asymmetric keys by using a trusted third party (Certificate Authority) to cryptographically bind a public key to an identity - when you receive someone's public key embedded in a certificate, the CA's digital signature on that certificate proves the key is genuine and untampered. MAC addresses (B) are hardware identifiers for network interfaces, unrelated to cryptographic key authentication. A DMZ (C) is a network architecture segment that isolates public-facing servers - a physical/logical network concept, not a key authentication mechanism. Passwords (D) are symmetric secrets used for user authentication, not for validating asymmetric key pairs.

Memory tip: Think "sign to certify" - a digital signature on a certificate is exactly how PKI (Public Key Infrastructure) certifies that an asymmetric public key belongs to who it claims to. If you can sign it, you can trust it.

Topics

#Asymmetric Cryptography#Digital Signatures#Key Authentication#PKI

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