ISC Identity And Access Management Architecture Practice Question
You are deploying OIDC (OpenID Connect) for a web application. You need to prevent token replay attacks. Which claim should the application validate in the ID Token?
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
✓
nonce
The 'nonce' claim is a cryptographically strong value that links the request to the response, allowing the client to verify that the ID Token was generated specifically for its request.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
iss
Why it's wrong here
The 'iss' claim identifies the issuer, not the request context.
- ✗
iat
Why it's wrong here
The 'iat' (issued at) claim prevents tokens from being used indefinitely, but does not prevent replay within the valid window.
- ✓
nonce
Why this is correct
The 'nonce' claim provides a unique link between the OIDC authentication request and the resulting token.
- ✗
sub
Why it's wrong here
The 'sub' claim identifies the user, not the request context.
About these practice questions
This ISC question is part of Courseiva's 208-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
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.