NETWORK SECURITY - PUBLIC KEY DISTRIBUTION

There are four ways to distribute the public keys among the users.
1) Public Announcement
2) Public Key Directory
3) Public Key Authority
4) Certificate Authority

[pavitrasinghtomar]

what a straight Explaination it was
Understood the CONCEPTS IN SHOT....BRAVO!!!

[amkeertana]

Thanks a lot sir, all the videos were crystal clear..helped me a lot for my exams.

[syedshakeel]

Sir,
This is such easy explanation to follow with example and details.
Thank you for such videos.

[ssn]

i love how he uses the duster after writing anything

[EllyHejazi]

It is really good explanation . Thanks for wonderful tutorial. 👌👌👌

[imabeapirate]

Thank you for this upload and sharing the knowledge!! Learned a lot!

[lks]

Nice explanation, my all doubts get cleared . Thank you sir .

[parveshtaneja]

Sir, I am going through your videos and it is really helpful to understand the concept and algorithm. Thank you very much.

[hiteshgorantla]

In public-key authority 19:42 point 3, 6, 7 It should be PU instead of KU as it's the public key of a and b not of PKA.

[sherymalik]

Where were you man? Awesome explanation..Cleared all my concepts. Thankyou so much .

[ptitx]

Thank you for this lession, it very helpful with me

[niharikareddy_ars]

Very good explanation sir. But if u explain it in less time u will gain more viewers because many of us will see the concepts during exams and we won't get that much time to see each concept.

[gaming_boga]

Sir you are great thanks a lot for your teaching

[siripanchadi]

Soooper.. ! U explained it very clearly ..thnkew

[a.yashwanth]

for the public key distribution, you told that certificates are encrypted by private key of authority so that anyone can verify if the certificate is valid by decrypting with CA public key. But how do you distribute the public key of CA in the first place?

[दया_भाभी]

Sir, complete the syllabus of network security as soon as possible . My exams are coming, and l'm waiting to see your video.
Thanku u sir

[Vishva-hn]

Thank you very much sir. i easily understood your class

[rinzinnorbu]

wow really nice explanation thank you sir

[sajalrastogi]

private key authority will be different for different users right so we should right KRauthA or KRauthB right?

[JMacSD]

Thanks for this wonderful tutorial on key distribution! But while it shows how authentication is performed in these key exchanges, that part seems exploitable, for instance:
In 3) Public Key Authority: A sends his ID(A) to B [encrypted with KU(B)], why is B sure this message came from A? Anybody who knows ID(A) could have sent it, right? For example, say now B wants to talk to F while fooling F to think he's talking to A, so B sends ID(A) where he's supposed to send his his own ID(B): how can F know this is a lie?
In 4) Certificate Authority: Now B wants to fool F so B sends C(A) instead of C(B), F can look at the time stamp in the cert and hopefully see it's too old, and B's lie fails.