What DH Group 2?

What DH Group 2?

The DH group is configured as part of the IKE Phase 1 key exchange settings. DH public key cryptography is used by all major VPN gateways. DH group 1 consists of a 768 bit modulus, group 2 consists of 1024 bit modulus, group 5 uses a 1536 bit modulus, and group 14 uses a 2048 bit modulus.

Is Diffie-Hellman Group 2 secure?

2—Diffie-Hellman Group 2: 1024-bit modular exponential (MODP) group. This option is no longer considered good protection. 5—Diffie-Hellman Group 5: 1536-bit MODP group. Formerly considered good protection for 128-bit keys, this option is no longer considered good protection.

What Diffie-Hellman DH group should I use?

Guidelines: If you are using encryption or authentication algorithms with a 128-bit key, use Diffie-Hellman groups 5, 14, 19, 20 or 24. If you are using encryption or authentication algorithms with a 256-bit key or higher, use Diffie-Hellman group 21.

What are the different Diffie-Hellman groups?

dh-group —Diffie-Hellman group for key establishment.

• group1 —768-bit Modular Exponential (MODP) algorithm.
• group2 —1024-bit MODP algorithm.
• group5 —1536-bit MODP algorithm.
• group14 —2048-bit MODP group.
• group15 —3072-bit MODP algorithm.
• group16 —4096-bit MODP algorithm.

What is the most secure DH group?

DH group 1 consists of a 768 bit key, group 2 consists of 1024 bit key, group 5 is 1536 bit key length and group 14 is 2048 bit key length. Group 14 is the strongest and most secure of the ones just mentioned, but there are other key lengths as well.

Why is AES better than 3DES?

AES vs 3DES The difference between AES and 3DES is that AES is much faster than 3DES, and it is also more secure than 3DES. As a standard symmetric encryption algorithm, AES comes after 3DES. So due to obvious reasons, AES is more advanced than 3DES. Its 128-bit keys provide ample strength.

Which Diffie-Hellman cryptographic group is the strongest and most secure?

Why do we use Diffie Hellman group numbers?

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.

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:

When to use Diffie Hellman groups in IKEv2?

In terms of VPN it is used in the in IKE or Phase1 part of setting up the VPN tunnel. There are multiple Diffie-Hellman Groups that can be configured in an IKEv2 policy on a Cisco ASA running 9.1 (3). In Nov 2016 ASA 9.6 (x) is available and there are no new changes to the DH Groups.

How many Diffie Hellman groups are there in IETF?

IANA Considerations IKE [ RFC-2409] defines 4 Diffie-Hellman Groups, numbered 1 through 4. This document defines a new group 5, and new groups from 14 to 18. Requests for additional assignment are via “IETF Consensus” as defined in RFC 2434 [ RFC-2434 ]. Specifically, new groups are expected to be documented in a Standards Track RFC.