This is by far the most simple explanation of the presented concepts - in a way that everyone understands it and from then can move on to the more complicated parts. Excellent.

this is the only video you need to watch if you want a practical understanding of digital signatures

Wow! This might be the best video on data integrity and data authentication - digital signatures rely on asymmetric cryptography.

Such an explanation with downgraded complexity, but with an upgraded realization. Exceptionally wonderful.

@ComputerScienceLessons

2 жыл бұрын

Thank you :)KD

This is the single best illustration/explanation of this concept on the internet. Keep making these videos man, you've got talent.

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

Used this video to get my Sec+ a few years back now... Back to refresh myself on this for my SSCP. Awesome video. Thank you so much!

Studying for CCNA Cyberops , the Cisco documentation on this is a complete mess. This video is pure gold , incredibly simple and clear. Thank you sir , keep up the great work . On more subscriber for your great channel :)

@zakariyaal2848

4 жыл бұрын

Exactly here for the same reason, good luck on you exam.

Amazing teaching. After viewing this video, finally I can understand the concept clearly.

Thank you for simplifying the concept of digital keys and explaining the role of hashing in it. Your explanation has made it easy for anyone to understand these complex theories.

@ComputerScienceLessons

Жыл бұрын

You are most welcome :)KD

2 days on the internet trying to understand this subject , your 11 min video made it , thank you alot !

@ComputerScienceLessons

3 жыл бұрын

Glad to be of service :)KD

I love the narration, the humour, the analogies and the simple and easily understandable format. Thank you!

@ComputerScienceLessons

2 жыл бұрын

You are most welcome :)KD

@seetsamolapo5600

Жыл бұрын

​@@ComputerScienceLessonsthe explanation is phenomenal sir. I wish you could make more videos on cybersecurity topics esp security+. I'd gladly join your patteon

This is by far the best explanation i've ever seen of this. Thanks a lot :D.

10 from 10! so easy to understand, A good lesson for other KZreadrs talking about Digital Signature!

Perfect! At 6:19 I first thought you made a mistake but after finnishing the whole video you carefully explain how a CA works. Brilliant. Thank you.

@ComputerScienceLessons

2 жыл бұрын

You are very welcome.

It's crystal clear the way you explain and demonstrate with animation.

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

This is the best explanation of digital certificates and digital signature i have come across. Thank you :)

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

Done thanks 0:15 explaining RSA 1:30 digital signatures: it doesn’t matter what key we encrypt with (public or private) the message can only be decrypted with the other key. A message can be digitally signed by encrypting it with the private key and then others can verify the signature by decrypting with public key. 3:58 digital signature example 5:40 sender hashes the message, encrypts the hash with their private key. Receiver decrypts the hash with the sender’s public key, and if it matches the message then receiver knows message came from sender 7:00 why we need digital certificates on top of digital signatures. Someone could be pretending to be the sender, and digitally signs the message. The receiver has no way of verifying the sender’s identity. Digital certificates is how the receiver can verify that a public key actually belongs to the sender 8:00 how certificate authority works

You have talent to explain concepts...Thank you

@ComputerScienceLessons

4 жыл бұрын

You're very kind. Thanks for the comment. :)KD

wow! that is very well made. direct, clear and no annoying repetitions

@ComputerScienceLessons

2 жыл бұрын

Thank you :)KD

You deserve an Oscar for that kind of explanation .

@ComputerScienceLessons

2 жыл бұрын

Thank you. I'll start writing my speech. :)KD

Finally, thank you so much I've been trying to understand this for a while now.

@ComputerScienceLessons

3 жыл бұрын

You're most welcome. :)KD

Finally, you explain it crystal clear! Thanks you very much!

@ComputerScienceLessons

3 жыл бұрын

You're most welcome. Thanks for commenting :)KD

i just saw this one video, but this is enough reason to subscribe. whatever you post I'm gonna watch it. damn

@ComputerScienceLessons

4 жыл бұрын

Welcome aboard :)KD

What a brilliant work !

I cannot thank you enogh for this video. You explained it without extra info Thanks alot 👍👍👍

@ComputerScienceLessons

4 жыл бұрын

You welcome. Thanks for the lovely comment. :)KD

finally, someone who puts it clearly and totally

@ComputerScienceLessons

4 жыл бұрын

Thanks for the comment. Really appreciated. :)KD

Thank for this breakdown, it gave me a better understanding of the entire concept.

@ComputerScienceLessons

Жыл бұрын

You are most welcome :)KD

THanks so much for this video, Fought hours to understand this

Excellent!! Explained in such a simple way. Thanks!

@ComputerScienceLessons

3 жыл бұрын

Thank you too :)KD

Thanks for this amazing video, it helped me understand digital signature more better

This channel is underrated!

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

Best explanation ever. Thank you Sir.

Thanks for the video. Keep up the good work 👍

Such a clear explanation - thank you !

fabulous explanation, simple and clear.

This is best and simplest explanation. Thanks

This is so lucid. Beautifully explained

@ComputerScienceLessons

Жыл бұрын

Thank you :)KD

Love this video. 100 out of 10 ( ten, yes ), you deciphered it properly.

@ComputerScienceLessons

Жыл бұрын

Thank you so much :)KD

Best video about digital certificates ever.

@ComputerScienceLessons

4 жыл бұрын

Thank you so much :)KD

Really great video! Explained the things clearly.

@ComputerScienceLessons

3 жыл бұрын

Delighted to help :)KD

Very good and clear explanation.

Finally I got this concept!!! Thanks!!

@ComputerScienceLessons

3 жыл бұрын

Delighted to help - it's actually a brilliantly simple idea isn't it!? :)KD

That was all I ever needed thank you so much for explaining with that great tone! You made my day :)

@ComputerScienceLessons

3 жыл бұрын

Thanks for the complement :)KD

Very helpful, thanks a lot !

Amazing explanation. Thanks

exceptionally clear and easy to understand

@ComputerScienceLessons

2 жыл бұрын

Thank you :)KD

Very impressive explanation

Great Explanation! Much appreciated

@ComputerScienceLessons

4 жыл бұрын

You're very welcome :)KD

Wts thats just genius 👏 how people come out with these stuff

I think I attained Nirvana after watching this! Thank you!!

@ComputerScienceLessons

Жыл бұрын

It's been a while since I've done that for anyone. You are very welcome :)KD

Great job 👍 amazing explanation 👏 thank you so much .

@ComputerScienceLessons

3 жыл бұрын

You're very welcome. 😳 :)KD

Thank you so much!!!! This was SOO helpful.

@ComputerScienceLessons

3 жыл бұрын

You are very welcome :)KD

Wonderful video!! Thanks a lot for great explanation

@ComputerScienceLessons

3 жыл бұрын

You're most welcome. Thanks for the lovely comment. :)KD

Thank you very much for clearing the concept

@ComputerScienceLessons

2 жыл бұрын

You are most welcome :)KD

Good freaking job mate, thanks.

@ComputerScienceLessons

2 жыл бұрын

TY :)KD

you took 10 minutes to teach me whatever my teacher trying to teach me in 3 hours, damn !!!

@ComputerScienceLessons

4 жыл бұрын

Glad to help :)KD

Nice way of explaining through graphics....

Ugh, this is great thank you so much!

@ComputerScienceLessons

4 жыл бұрын

You're welcome. :)KD

simple explanation. all i can say is wow!!!!

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

Awesome explanation.best video found on this topic

@ComputerScienceLessons

3 жыл бұрын

Thank you.

Fantastic, thank you

This is Gold!

@ComputerScienceLessons

4 жыл бұрын

Thanks. I appreciate the comment. :)KD

Excellent video!!!

@ComputerScienceLessons

4 жыл бұрын

Thx :) KD

Best explanation I have seen!😁

@ComputerScienceLessons

Жыл бұрын

Thank you :)KD

outstanding video

Best video on the topic

@ComputerScienceLessons

Жыл бұрын

Thank you :)KD

The research has came to an end

Excellent lesson!

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

excellent explanation!!!

@ComputerScienceLessons

4 жыл бұрын

Thanks for saying so. :)KD

Thank you for that. The certification authority is the bit missing from most other explanations!

@ComputerScienceLessons

3 жыл бұрын

You are very welcome. :)KD

Best explanation ever ❤ thanks bro

@ComputerScienceLessons

2 ай бұрын

Thank you so much :)KD

Pretty good, thanks a lot!

@ComputerScienceLessons

4 жыл бұрын

Thank you :)KD

Very helpful thanks!

@ComputerScienceLessons

4 жыл бұрын

You are welcome. :)KD

This video is really nice! However there is one part I can't wrap my head around. From my understanding: 1: Person A types a message 2: Person A generates a hash of the message using sha 3: Person A encrypts the generated hash using their private key 4: Person A appends the encrypted hash to the message as a signature, and sends it to person B 5: Person B receives the message along with the signature 6: Person B decrypts the signature (encrypted hash) using person A's public key 7: Person B runs sha on the message to generate a hash. 8: Person B compares the resulting hash from the message to the hash from decrypting the signature 9: If they are the same, it;s been verified successfully. So, what's the point of the sha layer exactly? Why not simply add the message encrypted with person A's private key as a signature? In both cases only person A's public key would be able to decrypt it so I can't see how running it through sha would make a difference.

@ComputerScienceLessons

Жыл бұрын

Nice question. One of the key features of a hash algorithm is that it produces a hash value of a fixed size. SHA256 for example will produce a hash value that is always 256 bits long, no matter how big the original message. This ensures that the digital signature is a manageable size, regardless of the document being signed. You might like my series on cryptocurrency which also explains the benefits of hashing. kzread.info/head/PLTd6ceoshprd7UngbhRHMgKXcWz4PIBEe :)KD

fantastic channel i love it

@ComputerScienceLessons

3 жыл бұрын

Thank you. That's music to my ears :)KD

great content. I wonder if it calculates different hash for different data so digital signature is changed everytime on certificates or not ?

Lovely work well done.

@ComputerScienceLessons

3 жыл бұрын

Thank you. Lovin' your name :)KD

if someone was in the middle of a digital signature between person a and b couldnt they(person m) hash the email/text and sign it with their own key and send that to person b. Then when person b sends an email back to a, person m can hash the email and send a resigned version back to a?

For the past fews months I'm looking for something on cryptography and i found this finally thanks

Amazing explanation :-)

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

This is really a great explanation, Question: If we talk about a real scenario, A client browser want to access some webpage and send a request, what would be the actual message first time from client and what will be the revert from the server? In the example, The message is the actual document but what would be in the actual scenario? is it certificate itself from the web server?, that's what I can guess.

thanks it helps a lot

@ComputerScienceLessons

Жыл бұрын

You're welcome :)KD

This is Bob, Bob is builder !!! caught me so off guard ahahhaahah

@ComputerScienceLessons

2 жыл бұрын

He says he's a builder, but he's really a con artist :)KD

thank you!

Thank you !!!

@ComputerScienceLessons

9 ай бұрын

You are most welcome :)KD

so we use the same private key to encrypt data as well as to sign or better use different pairs?

Amazing explanation TQ

@ComputerScienceLessons

Жыл бұрын

You're most welcome :)KD

Very well explained

@ComputerScienceLessons

2 жыл бұрын

Thank you :)KD

So if you don't have a certificate authority where does Jill's computer look to verify the public key?

great explanation

@ComputerScienceLessons

2 жыл бұрын

Thank you. You might like my crypto videos :)KD

Is the Digital Certificate embedded in the document that is being sent or attached to the email message with the document? What prevents a bad guy from obtaining a copy of someone else's digital certificate and using it to pass himself off as the rightful owner of the digital certificate?

So a CA signs everything they send to their client?

Good Explanation

@ComputerScienceLessons

3 жыл бұрын

Thank you :)KD

If the public key has the algorithm to encrypt a message if someone has the same public key can't he reverse engineer it and decrypt it?

very lucid!

@ComputerScienceLessons

Жыл бұрын

Thank you :)KD

great video

@ComputerScienceLessons

Жыл бұрын

Thank you :)KD

6:44 What is the use of encrypting the hash value here using BOB Private key and sending, As however it can be decrypted by BOB's public key which is available to everyone You can directly send the hash value or use Gill public key and encrypt and send right?

Good content 🙂

@ComputerScienceLessons

Жыл бұрын

Thank you :)KD

Bob looks like the POTUS 45

never having worked with this stuff I really don't understand. jack presents his public key along with the digest and puts it in a digital certificate. Jill trusts this because she trusts the 3rd party that "vouched" for jack. I get that in a very generic sense. but what exactly does jill see when she compares the certificate to whatever she sees when she queries the certification authority?

@ComputerScienceLessons

3 жыл бұрын

Hopefully, nothing. The process is carried out by the web browser in the background. If there's a problem she may see a message saying the websites certificate in invalid. (double click the little padlock in your browser's address bar). :)KD