Which of the following is an example of Public Key (Asymmetric) systems?

Which of the following is an example of Public Key (Asymmetric) systems?

• A. Public Key (Asymmetric)
• B. Private Key (Symmetric)
• C. Shared Key
• D. Hash Function

Answer: (A)

Public key (asymmetric) systems rely on a pair of keys: a public key that can be shared openly for encryption or verification, and a private key kept secret for decryption or signing. This design solves the key distribution problem because you can send encrypted data to someone using their public key without needing a shared secret, and only the holder of the private key can decrypt it. Among the options, the one that aligns with this concept is the item that explicitly states Public Key (Asymmetric). The other choices describe symmetric approaches or a hash function, which do not use a public/private key pair for encryption and decryption. For example, public-key schemes like RSA or ECC enable encryption with the public key and decryption with the private key, and they also support digital signatures when the private key is used to sign and the public key to verify.

Public key (asymmetric) systems rely on a pair of keys: a public key that can be shared openly for encryption or verification, and a private key kept secret for decryption or signing. This design solves the key distribution problem because you can send encrypted data to someone using their public key without needing a shared secret, and only the holder of the private key can decrypt it. Among the options, the one that aligns with this concept is the item that explicitly states Public Key (Asymmetric). The other choices describe symmetric approaches or a hash function, which do not use a public/private key pair for encryption and decryption. For example, public-key schemes like RSA or ECC enable encryption with the public key and decryption with the private key, and they also support digital signatures when the private key is used to sign and the public key to verify.