How Many Bits Do the DH Groups Used by Huawei Cloud VPN Have?
Diffie-Hellman (DH) groups determine the strength of the key used in the key exchange process. Higher DH group numbers are usually more secure, but more time is required to calculate the key.
Table 1 lists the number of bits corresponding to the DH groups used by VPN.
DH Group |
Modulus |
---|---|
1 |
768 bits |
2 |
1024 bits |
5 |
1536 bits |
14 |
2048 bits |
15 |
3072 bits |
16 |
4096 bits |
19 |
256 bits (ECP) |
20 |
384 bits (ECP) |
21 |
521 bits (ECP) |
![](https://support.huaweicloud.com/eu/vpn_faq/public_sys-resources/note_3.0-en-us.png)
The following DH algorithms have security risks and are not recommended: DH group 1, DH group 2, and DH group 5.
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