ISC Identity And Access Management Architecture Practice Question
You are architecting a solution to mitigate 'Token Theft' in a Zero Trust environment. Which mechanism binds a token to a specific client instance?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DPoP (Demonstrating Proof-of-Possession)
DPoP (Demonstrating Proof-of-Possession) binds tokens to a private key held by the client, ensuring that even if a token is stolen, it cannot be used without the accompanying private key.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
PKCE (Proof Key for Code Exchange)
Why it's wrong here
PKCE protects the authorization code exchange, not the access token replay.
- ✗
Refresh Token Rotation
Why it's wrong here
Rotation helps limit the impact of a stolen refresh token, but does not prevent the initial theft/replay.
- ✓
DPoP (Demonstrating Proof-of-Possession)
Why this is correct
DPoP adds cryptographic binding between the token and the sender.
- ✗
MFA step-up
Why it's wrong here
MFA is an authentication step, not a token-binding mechanism.
About these practice questions
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official (ISC)² exam blueprint
This ISC practice question is part of Courseiva's free (ISC)² certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ISC exam.