What is the Diffie-Hellman group?

What is the Diffie-Hellman group?

Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Within a group type (MODP or ECP), higher Diffie-Hellman group numbers are usually more secure. Diffie-Hellman performance can vary by WatchGuard hardware model.

What is Diffie-Hellman group in IPsec?

Diffie-Hellman—A public-key cryptography protocol that allows two parties to establish a shared secret over an unsecure communications channel. Diffie-Hellman is used within IKE to establish session keys. It supports 768-bit (the default), 1024-bit, 1536-bit, 2048-bit, 3072-bit, and 4096-bit DH groups.

How do I choose a Diffie Hellman group?

Diffie Hellman groups

1. Select None if you do not want to use perfect forward secrecy.
2. Select Group 1 to use a modular exponentiation group with a 768-bit modulus.
3. Select Group 2 to use a modular exponentiation group with a 1024-bit modulus.
4. Select Group 5 to use a modular exponentiation group with a 1536-bit modulus.

Which Diffie Hellman Group choices are no longer recommended?

24—Diffie-Hellman Group 24: 2048-bit MODP group with 256-bit prime order subgroup. This option is no longer recommended.

Why do we need a Diffie Hellman group?

Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Higher group numbers are more secure, but require additional time to compute the key. Fireware supports these Diffie-Hellman groups:

Which is more secure MoDP or Diffie Hellman?

Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Within a group type (MODP or ECP), higher Diffie-Hellman group numbers are usually more secure. Fireware supports these Diffie-Hellman groups:

How many versions of Diffie Hellman are there?

There are three versions of Diffie-Hellman used in SSL/TLS. Anonymous Diffie-Hellman Fixed Diffie-Hellman Ephemeral Diffie-Hellman

How does a fixed Diffie Hellman certificate work?

Fixed Diffie-Hellman embeds the server’s public parameter in the certificate, and the CA then signs the certificate. That is, the certificate contains the Diffie-Hellman public-key parameters, and those parameters never change. Ephemeral Diffie-Hellman uses temporary, public keys.