How many layers of Encryption standards are defined by FIPS?

• A. Three
• B. Four
• C. Five
• D. Six

Answer: (B)

FIPS organizes encryption standards across four distinct layers to ensure cryptography is implemented securely in federal systems. The first layer is the data encryption algorithms themselves, such as DES, 3DES, and AES—the actual ciphers that protect the data. The second layer covers key management and exchange, including how keys are generated, stored, rotated, and distributed. The third layer focuses on the cryptographic modules that implement these algorithms, ensuring they operate securely as a unit (trust boundaries, tamper resistance, and proper isolation). The fourth layer is the validation and conformance framework, where implementations are tested and certified through programs like the NIST validation processes to confirm they meet the standard.

So the number of layers defined is four.