Which DSAC domain would you study to protect data with encryption?

• A. Access Control
• B. Software Assurance
• C. Cryptography
• D. Governance

Answer: (C)

Protecting data with encryption is the realm of cryptography. This field focuses on converting plaintext into ciphertext and back again using algorithms and keys, so information stays confidential even if someone intercepts it. Cryptography covers encryption algorithms (both symmetric and asymmetric), key management, and the protocols that keep communications and data protected. By applying these techniques, data at rest or in transit remains unreadable without the proper keys. The other domains handle different security aspects: access control governs who can access resources and under what conditions, governance deals with policies and compliance, and software assurance focuses on building and operating secure software. So cryptography is the area you’d study to protect data through encryption.