Triple

Target class: public-key cryptography
Context triple: [Curve25519-based schemes, instanceOf, public-key cryptography]

• A. public-key cryptographic algorithm
  A public-key cryptographic algorithm is a method that uses a mathematically related pair of keys—one public and one private—to enable secure operations such as encryption, digital signatures, and key exchange over untrusted networks.
• B. public-key cryptography standard
  A public-key cryptography standard is a formally defined specification that governs how asymmetric key pairs are generated, distributed, and used to securely encrypt, decrypt, sign, and verify digital data.
• C. asymmetric cryptographic algorithm chosen
  An asymmetric cryptographic algorithm is a method that uses a mathematically related pair of keys—one public and one private—to enable secure operations such as encryption, decryption, and digital signatures without sharing secret keys.
• D. cryptographic key
  A cryptographic key is a piece of information, usually a string of bits, used by cryptographic algorithms to encrypt, decrypt, sign, or verify data securely.
• E. cryptographic primitive
  A cryptographic primitive is a low-level, well-defined algorithm or protocol (such as a hash function, block cipher, or digital signature scheme) that serves as a basic building block for constructing more complex cryptographic systems and protocols.
• F. None of above.