All answers must be original and in paragraph form to count.

A. The first tenet of cryptography is confidentiality; that is, assuring the two parties who are engaged in a secure communication that their traffic, if subjected to eavesdropping, will not be understood due to the application of a cryptographic encryption method. If this method is of the symmetric type, a session key must be generated first. Diffie-Hellman and Elgamal are two such algorithms that produce session keys. Discuss the similarities and differences between different key generation schemes (D-H and Elgamal, for instance).

B. Discuss the specific applications where D-H is used extensively.