Which of the following algorithms are used in asymmetric encryption?

Asymmetric encryption relies on the use of key pairs—a public key and a private key—where one key encrypts data, and the other key decrypts it. RSA is a widely used algorithm in asymmetric encryption, known for its effectiveness in secure data transmission. It primarily addresses the challenges of key distribution and allows secure communication without needing to share a private key.

Blowfish and Twofish, on the other hand, are symmetric encryption algorithms, which means they utilize the same key for both encryption and decryption. This key-sharing requirement poses challenges for secure key distribution, which asymmetric encryption is designed to resolve.

Diffie-Hellman is primarily used for secure key exchange rather than for encryption itself. It establishes a shared secret between two parties, which can then be used in symmetric encryption, but does not provide the encryption of data directly.

Thus, RSA stands out as the appropriate choice when discussing algorithms specifically designed for asymmetric encryption.