CSSLP Secure Software Concepts Practice Question
In an OAuth 2.0 flow, you are using the 'Authorization Code' grant type. You notice an attacker is attempting to intercept the code. Which security concept is being utilized by requiring the client_secret during the token exchange?
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
✓
Authentication
The client_secret provides authentication of the client to the authorization server, ensuring only the intended client can exchange the code.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Availability
Why it's wrong here
Availability ensures the service remains reachable.
- ✗
Non-repudiation
Why it's wrong here
Non-repudiation is about proof of origin, not client identity verification.
- ✗
Confidentiality
Why it's wrong here
This protects data against unauthorized disclosure, but the client_secret is for authentication.
- ✓
Authentication
Why this is correct
Authentication verifies the identity of the client application.
- ✗
Integrity
Why it's wrong here
Integrity ensures data hasn't been tampered with.
About these practice questions
Courseiva writes every CSSLP question from scratch — 198 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or 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 CSSLP 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 CSSLP exam.