Definition: In this context, "DiffieHellman" refers to a cryptographic protocol or algorithm used in communication over the Internet to securely exchange messages between two parties using secret keys. The term "DiffieHellman" comes from the names of two key-value pairs: Diffie (which stands for "private") and Hellman (a name of a character in the Bible). In a context where private keys are exchanged, this refers to a system where only those who know one key (the "diffie") can compute another (Hellman) using their own public key. This is essential to secure communication because it allows for encryption without compromising privacy. The cryptographic concept involves secret keys and the ability to derive them from other public keys or shared secrets. The key-value pairs used by DiffieHellman are designed to ensure that any party can calculate the values of the keys independently, thereby maintaining security. This is similar to how "RSA" (Rivest-Shamir-Adleman) encryption works, where each message has a unique public and private key pair. However, in this context, it's about secure communication between two parties using shared secret keys rather than just encryption alone.
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