Read the original article: Diffie Hellman Key Exchange
In early 70’s to send a secret message, both parties (sender and receiver) had to exchange the key to encrypt and decrypt the message. Exchanging the secret key may lead to compromising the security, as while exchange this key if someone intercepted the secret key then the interceptor can decrypt all messages. This problem is called the key exchange problem in computer science.
The key exchange problem is not just limited to communication but also arises in network communication. To solve key exchange problems, Whitfield Diffie and Martin Hellman presented the Diffie-Hellman Key Exchange algorithm in 1976.
Read the original article: Diffie Hellman Key Exchange