Score:0

What is the Diffie Hellman session key used for in IPsec protocol?

ar flag

Let's say we choose AES as cryptographic algorithm for IPsec. My question is the following

Is the key produced by Diffie-Hellman algorithm used as INPUT to the AES algorithm so AES does the encryption with it?

Score:0
my flag

Is the key produced by Diffie-Hellman algorithm used as INPUT to the AES algorithm so AES does the encryption with it?

Well, it depends on how the keys used by IPsec are generated; the IPsec RFC (RFC 4301) does not specify it, and there are several methods used in practice.

The most common method is with IKE (RFC 7296); that does perform a Diffie-Hellman between the two parties, and the result of that is used (along with other data) to generate the AES keys (through a number of steps).

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.