DF algorithm, after exchanged public key, why need send shared-secret over to other s

Member Posts: 91 ■■□□□□□□□□
DF algorithm, after exchanged public key, why do we need to send shared-secret over to other side,
I'm confused because DF would generate the shared-secret key using two public key, therefore it doesn't need to send it over, isn't it?

thank you for viewing, I have test in 2 hours

• Banned Posts: 12,312 ■■■■■■■■■□
Because symmetric key encryption is significantly faster than asymmetric. Asymmetric is typically used with small amounts of data, such as the symmetric key.

• Member Posts: 91 ■■□□□□□□□□
dynamik wrote: »
Because symmetric key encryption is significantly faster than asymmetric. Asymmetric is typically used with small amounts of data, such as the symmetric key.

thx for the reply , my question is ambiguious , I mean I understand that they use sysmetric key for transfer but according to algorithm, they don't have to transfer the sysmetic key over because the DF can calculate the sysmetric key by using two public key (one for me and one for you) without sending the sysmetric key over, isn't it???

THank you for helping.
• Banned Posts: 12,312 ■■■■■■■■■□
Dude, I am not awake yet. It's not an asymmetric algorithm at all; I don't know what I was thinking. Yes, it's used to establish a shared secret. It's a flexible method of exchanging keys, so it's used with many other algorithms, which is the key that it's sending over. You're correct that it doesn't need to send the key over that's calculated since both parties are able to derive it from the calculations.
• Member Posts: 91 ■■□□□□□□□□
poguy wrote: »
thx for the reply , my question is ambiguious , I mean I understand that they use sysmetric key for transfer but according to algorithm, they don't have to transfer the sysmetic key over because the DF can calculate the sysmetric key by using two public key (one for me and one for you) without sending the sysmetric key over, isn't it???

THank you for helping.

thx, dynamik, I think that's use for peer identify...
• Inactive Imported Users Posts: 5,031 ■■■■■■■■□□
poguy wrote: »
DF algorithm, after exchanged public key, why do we need to send shared-secret over to other side,
I'm confused because DF would generate the shared-secret key using two public key, therefore it doesn't need to send it over, isn't it?

thank you for viewing, I have test in 2 hours

How did you do?