Question

Which property of network security is used to protect data from unauthorized modification deletion or addition ?

• A. Confidentiality
• B. Authenticity
• C. Integrity
• D. Non-Repudiation

Answer 1

Answer:

C. Integrity

Core Concepts of Information Security

• Integrity: This property ensures that data is maintained in a consistent, accurate, and trustworthy state throughout its lifecycle. It prevents unauthorized users from altering, deleting, or adding information.

• CIA Triad: The fundamental model of information security comprises three pillars: Confidentiality (protection from unauthorized disclosure), Integrity (protection from unauthorized modification), and Availability (ensuring data is accessible to authorized users).

Mechanisms to Ensure Integrity

1. Hashing: Algorithms such as SHA-256 or MD5 create a unique digital fingerprint of data. If the data is modified, the hash value changes, alerting the system to the tampering.

2. Digital Signatures: These provide both authentication and integrity by verifying that the document was created by a known sender and has not been altered in transit.

3. Access Control Lists (ACLs): These restrict user permissions, ensuring only authorized personnel can perform write, edit, or delete operations.

4. Version Control Systems: Tools like Git maintain a history of changes, allowing for the detection of unauthorized modifications and the ability to revert to a previous, verified state.