Explaining the Diffie-Hellman Key Exchange

The Diffie-Hellman key exchange is used extensively in Internet communications today. Many web applications use this key exchange because it achieves Perfect Forward Secrecy (using ephemeral keys) which provides more security than other key exchange algorithms like RSA. In this video, John explains the Diffie-Hellman key exchange, and he walks through an example of the calculations used to make it all work.

[travisblack]

This is the most well explained and best presented lecture I have seen on youtube, and I have watched many. Nice job.

[marcing]

Watched so many videos and read quite few pages with an explanation... and finally, someone explained this really clearly ! good job

[rahulmathew]

The best and simplest explanation ever on youtube for Diffie-Hellman key. No unnecessary maths symbols were used and the concept was explained with very simple example and to the point. This is the kind of teachers we wish to have in Colleges.

[Abdulaziz-fgmh]

now I know how Diffie Helman key exchange work! thank you so much, man

[hanf]

Here from Cyber Security and you explained it extremely well than my professor did or ever will. I'm just upset for the tuition I'm paying. Thanks a lot!!

[rahulmathew]

Simple and straight to the point and no maths symbols involved . Professors should learn from you.

[minhsp]

He is very good:
1) No Indian accent
2) very logical
3) He should say why the shared key is needed.
The reason is that a and b have to have the same key to encrypt and decrypt
4) But they have to meet in a restaurant to share that key
5) Impractical
6) then they have to go through all these steps to arrive at the common key, 18 in this example
Thank you, the best video on this topic

[rahulmathew]

Pure and simple to the point and no stupid maths symbols. Professor should learn from you.

[kiruthikagopi]

Awesome. All these days I was just hearing DHE DHE... around . Now I know what it actually is. Thank you.

[LFSPharaoh]

I love these videos; the math always blows my mind. It just, works. So beautiful.

[kwatta]

Very explanatory and i love it. When i was reading it from my pdf it was difficult for me to understand but here is been made very simple. Good job

[abhinavkothari]

Makes it so easy to understand. Exceptional explanation.

[LetsNerdIt]

Perfect!
I was looking for a number example of how this works and you nailed it!

Thank you for making the math clear, rather than just mixing paint... although the paint analogy makes the idea simple, it make the math side of it harder to understand.

Sub well deserved

[theisjuullanglands]

Thanks for a great, clear easy understandable explanation - very appreciated!

[ishanmadhuranga]

LoL my lecture took about 30min for this.... You just took 11min to explain it and It was so clear!! Thank You :)

[Karim-nqbe]

Thank you. Amazing video, clear and practical, great job!

[brianward]

Thank you so much. A lot easier to understand then the way my lecture tried to teach

[stephen]

Excellent video! I can't wait to watch your IKEv2 when it becomes available

[ShopperPlug]

that was the best explanation on the subject on youtube.

[thompsi]

I decided during lockdown I would understand the encryption techniques used all of the time. This has helped hugely. Thank you so much!