What was the purpose of the National Institute of Standards and Technology's (NIST) selection of Ascon for lightweight cryptography?

• A. To standardize heavy encryption for servers
• B. To extend hashing functions
• C. To replace RSA in all contexts
• D. To provide efficient and secure encryption for devices with limited resources

Answer: (D)

Lightweight cryptography aims to provide strong security with a small footprint, so devices with limited processing power, memory, and energy can still protect data effectively. Ascon was chosen because it is designed to be efficient in both hardware and software while delivering robust authenticated encryption, which provides confidentiality and data integrity with a minimal resource requirement. This makes it well suited for constrained environments like IoT, embedded systems, and other devices that can’t support heavy cryptographic workloads. In that context, the goal isn’t to standardize heavy encryption for servers, extend hashing functions, or replace RSA in all scenarios; it’s to enable secure, efficient encryption where resources are at a premium.