The cybersecurity objective ofintegrityensures that data isaccurate, complete, and unaltered. The most direct method to support integrity is the use ofdigital signaturesbecause:
* Tamper Detection:A digital signature provides a way to verify that data has not been altered after signing.
* Authentication and Integrity:Combines cryptographic hashing and public key encryption to validate both the origin and the integrity of data.
* Non-Repudiation:Ensures that the sender cannot deny having sent the message.
* Use Case:Digital signatures are commonly used in secure email, software distribution, and document verification.
Other options analysis:
* A. Data backups:Primarily supports availability, not integrity.
* C. Least privilege:Supports confidentiality by limiting access.
* D. Encryption:Primarily supports confidentiality by protecting data from unauthorized access.
CCOA Official Review Manual, 1st Edition References:
* Chapter 5: Data Integrity Mechanisms:Discusses the role of digital signatures in preserving data integrity.
* Chapter 8: Cryptographic Techniques:Explains how signatures authenticate data.