Which algorithm is used to automatically generate a shared secret for two systems to use in establishing an IPsec VPN?

Which algorithm is used to automatically generate a shared secret for two systems to use in establishing an IPsec VPN?

• SSL
• DES
• AH
• DH
• ESP
• 3DES

Explanation: The Diffie-Helman (DH) algorithm is the basis of most modern automatic key exchange methods. It is a mathematical algorithm that allows two computers to generate an identical shared secret on both systems without having communicated before. DH is commonly used when data is exchanged using an IPsec VPN.

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