ISC Identity And Access Management Architecture Practice Question
Which THREE mechanisms are commonly used to secure the 'Authorization Code' in an OAuth 2.0 flow?
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
✓
Implementing PKCE (Proof Key for Code Exchange).
HTTPS (transport security), PKCE (binding code to request), and short-lived tokens/codes are standard security measures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Implementing PKCE (Proof Key for Code Exchange).
Why this is correct
Prevents code injection/theft.
- ✓
Using short-lived codes and tokens.
Why this is correct
Reduces the window of exploit.
- ✗
Storing the code in a public client's local storage.
Why it's wrong here
This is insecure.
- ✗
Sending the code in the URL fragment of a redirect.
Why it's wrong here
This is characteristic of the insecure Implicit flow.
- ✓
Enforcing TLS for all communication.
Why this is correct
Prevents interception.
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.