Which of the following is NOT a characteristic of RSA?

The choice that states RSA is based on a symmetric algorithm is correct to identify as not a characteristic of RSA. RSA, which stands for Rivest-Shamir-Adleman, is fundamentally an asymmetric encryption algorithm. Asymmetric encryption uses a pair of keys: a public key for encryption and a private key for decryption. This contrasts with symmetric algorithms, which rely on a single key for both encryption and decryption.

RSA’s security is based on the mathematical difficulty of factoring large prime numbers. This is a crucial aspect of RSA and underlies its functionality and strength in securing communications.

Additionally, RSA is indeed capable of producing digital signatures, enhancing its utility in verifying authenticity and securing messages. Furthermore, while RSA can utilize third-party key distribution centers in certain systems for facilitating secure communication, this is not a defining characteristic of RSA itself. Overall, the distinction of RSA as an asymmetric algorithm is fundamental to its operation and application in cryptography.