Kerberos - authentication protocol

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At 4:30: A mistake: step 3: When the file server gets the token, it "decrypts" (not "encrypts") the token with the secret key shared with TGS.
In Greek mythology, Kerberos is a dog with three heads. But today I will not talk about the dog. Kerberos is an authentication protocol for client/server applications. I will demonstrate with an example how Kerberos works. Keep in mind, Kerberos implements private key encryption.
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Advanced Cryptography:
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[@tanhazjustdance2024fan4ever]

This the best explanation about Kerberos I saw on youtube. This is coming from a senior systems engineer. Keep up the good work.

[@sunnyclassroom24]

Thank you very much!

[@izaiahjohnny4219]

instablaster...

[@WildcardSigma]

Agreed!!!

[@coemgen4429]

I agree, best video ever about Kerberos Quick Explanation, thanks

[@rehm3868]

This man can literally make complicated subjects very easy to REMEMBER and UNDERSTAND

[@sunnyclassroom24]

Thank you very much! I appreciate it!

[@adrianvrouwenvelder6919]

Good explanation. I'm glad you corrected the error at 4:30 about step 3 (where you said "encrypt" instead of "decrypt"). That bit had me scratching my head until I read the comments.

[@sunnyclassroom24]

Thank you for watching!

[@ronaldbert]

Thank you Sunny. I am humbled by your noble giving heart. With your help, I passed my Network+ COMPTIA exam, and am now pursuing Security+ excellence. Your instructions are such a refreshment in a cruel world. Your help lifts us all; may more love bless your joy!

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I am happy for you! and congrats on your ComPTIA Network + ! And good luck with your security +, which would cover half of network + content.

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How's your journey coming along?

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@@monikabandic5386 Thank you for interest in the journey always forward :-). I pray yours has that continuing higher call. Each of us reaches out every day, and success is found in the thankful love we find. May your journey hold this truth.

[@beeflat2896]

I'm so happy I decided to study IT at a time when Sunny's videos exist.

[@sunnyclassroom24]

Thanks!

[@noobedits8033]

My goodness! This is the explanation that my brain is yearning for! Clear, concise and with the added bonus of flowing diagrams. Thank you Sunny! You really are a guiding light for my 30ish brain! ^_^

[@humbertomacias6486]

Great explanation. Minor mistake was duly noted about decryption step between client and fileserver when decrypting the encrypted token granted by the Ticket Granting Server. Thanks!

[@Vincerama]

Thanks! I was thinking the same thing, but wasn't sure. He says at 4:24 "When the file server gets the token, it ENCRYPTS the token", I think he means that it DECRYPTS the token. I had to play that back to make sure I heard what I heard, but if you noticed it too, then I think my gut was right and it's just a mistake in the video.

[@monetka79]

Finally, this video made the meaning of Kerberos clear for me. The best explanation ever!

[@utkarshagrawal6060]

WOW! after spending two hours of searching finally I got this. A very very clear video. Thanks for your efforts.

[@rampandi9302]

Whenever I was not clear with any topic I will search for sunny videos in KZbin..

[@sunnyclassroom24]

Thank you very much. it means a lot to me.

[@mohammadmuzibulhaque4041]

This is a simple but yet granular and best explanation on Kerberos authentication context on KZbin. Thank you Sunny for making this videos.

[@sunnyclassroom24]

You're most welcome

[@nekilof-2363]

I really liked the visuals you provided. It really helped me understand the "three heads of Kerberos" (the three keys).

[@An8FoldFunky]

That was truly brilliant, thanks for making this so easy to understand.

[@sunnyclassroom24]

you are welcome. Thank you for leaving nice comment.

[@2dapoint424]

Cannot be explained more simpler than this!! Very good work!! Thanks for uploading..

[@sunnyclassroom24]

Most welcome!

[@mribrahimkhan4478]

At 4:30 A mistake: step 3: When the file server gets the token, it "decrypts" (not "encrypts") the token with the secret key shared with TGS.

[@joshuanyandwaro537]

💯

[@dgarcia1688]

Kerberos has been very difficult for me to comprehend, this helped so much. Thank you Sunny.

[@sunnyclassroom24]

You're most welcome

[@aznibas]

I learnt so much from your VDOs that I can not explain. I wish I could learn more that I need to learn from you. Thank you.

[@sunnyclassroom24]

Happy to hear that!

[@rasucama2924]

BEST Explanation! Thank you so much!!!

[@coryhebert3413]

Unbelievably good explanation. The best I've come across. Keep up the great work!

[@sunnyclassroom24]

Thanks a lot.

[@akimbowasabi]

Personally, i think this is the best explanation about how Kerberos works on KZbin.

[@sunnyclassroom24]

Many thanks. I am glad it helped.

[@_Arko44]

And just like that, I understand in six minutes what I have been trying to understand for over 30 minutes. Sunny is the best!

[@James-km3xq]

Thank Sunny, I started watching your clips daily, they are so helpful and easy to understand as stated by everyone!

[@siddarthp8586]

Thank you for making this video...I searched about Kerberos everywhere and found it difficult to understand. But, you explained in such a simple way that I could easily understand and remember the concept well...thank you so much Sir🙏🏼

[@harendrakumar9966]

This is ultimate level of explaination with proper visualization diagram. : )

[@voldimmoral]

This is the most useful breakdown of Kerberos I've found anywhere on the Internet. This is gold, thank you! I also wanted to compliment your English language. You took your time and did fantastic pronouncing words. Awesome job!

[@morganwoodstech9654]

This just made more than a few Active Directory concepts I've been learning about in my cybersecurity studies click. Wonderfully simple and straightforward explanation!

[@TravelCircuit]

I searched and found a lot of videos related to network security..but when i saw your video in the list.. suddenly I just clicked on your's one..and got the thing whatever I want to get.. Just want mentor like you on KZbin 😊😊

[@marcosalameh8677]

This video made the meaning of Kerberos clear for me. The best explanation ever! Amazing!!!!!!!!!!!!!!!!!!!!!

[@danielerapisarda4465]

you are the best teacher on youtube...with you, learning is too easy..

[@tannergordon8302]

been trying to fully wrap my head around Kerberos for a bit now. Love the call to greek mythos, and the video did an excellent job explaining! Thank you!!

[@Coordman]

Sunny, I am studying for my SY0-601. Kerberos had me completely baffled until I watched your video. Thank you SO MUCH!!

[@amazingworld-dc9hx]

The best video on KZbin to know about Kerberos

[@chiragbhayana2312]

Your explanation is genuinely very grasping and absorbing. Continue making more such videos

[@doomedpepper8109]

Great video! However, there were 2 mistakes: 1) At 2:26, the request is encrypted with a HASH of the clients password, not the clients actual password (because that would mean that the Authentication Server is storing the clients password in plaintext, which is NOT GOOD - it instead stores a hash of the clients password) 2) At 4:32, it should be "decrypts the token" instead of "encrypts the token", because it's already been encrypted. Other than that, great explanation. Very easy to understand!

[@ian230187]

True...even i was a bit skeptical about the point 1....

[@sulekha3771]

sorry i am just trying to understand a bit better. can you explain how the request is encrypted with a hash of the client's password??

[@sb_4]

I think you're right in your first point about this being wrong, but I don't think you're correct either. The initial request to the AS is completely plaintext. Please do correct me if you think I'm wrong. I agree that the _response_ (including the TGS session key etc) from the AS would be encrypted using the hash of the client's password.

[@doomedpepper8109]

@@sb_4 the initial request is the client providing their credentials so that they can be authenticated. Why would that be in plaintext lol. Anyone would be able to sniff the traffic and obtain their credentials that way

[@sb_4]

@@doomedpepper8109 Because they just send their username, not their password (nor hashed password). There is no need to authenticate, aside from the Authentication Server checking that the user exists, because of the fact that the user can only decrypt the first response from the AS if they know their password / hashed password.

[@AdamSouquieres]

Just got threw multiple youtube lessons about Kerberos, and this explanation was clearly the best.

[@udayjordan3454]

hand down the best explanation you can get anywhere. Thanks a lot for this.

[@giovanniritchie]

Simply the best explanation on the subject I've ever seen.

[@vladimirvolodin6541]

The most understandable explanation of Kerberos on entire Internet

[@sunnyclassroom24]

Thanks a lot for your comment.

[@Xx-nd1rs]

I watched some videos on this topic but i was still confused but your explanation was very clear and easy to understand.. I’m so grateful thank you

[@junichik2731]

Very good explanation. Not confusing. Gives the essence of this mechanism. Thank you.

[@KDOERAK]

A great intro to Kerberos: short, simple and to the point - thx!

[@planetside11]

That's the clearest explanation of Kerberos that I've ever heard. Thank you, Sunny.

[@taoyinghuang1439]

Wonderful explanation. Good job Sunny Classroom

[@sunnyclassroom24]

Thank you! 🙂

[@amandeepsingh6581]

Its amazing within 6 minutes you can explain that topic that well...

[@TheMbudzeni]

When I heard him talk I almost stopped the video but I am glad I didn't because he explains Keberos authentication very well

[@sunnyclassroom24]

Thank you for watching! I appreciate it!

[@atuhaireandrew3201]

This is truly the best explanation on Kerberos that I have seen. Very easy to understand. Thank you!

[@proptbro]

Wow great explanation best explanation on KZbin

[@sunnyclassroom24]

Many thanks.

[@tarnveersingh2552]

No only on SONNY's Channel

[@raptorcybersecurity]

I'm in a graduate course in networking and the explanation there was in the form of voluminous text explanation and a crappy graphic from Wikipedia (lame). This is a beautifully clear explanation that leaves no doubts in my mind about the process, or the objects/subjects involved - Thanks!

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Thank you for the explanation with zero fluff.

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I just love the way you say "This is Sunny" haha!! Yeah!! Your explanation is too brilliant. Keep going!!!

[@brettnieman3453]

Great explanation, thanks!! Taking my CISSP this week and was having such a hard time conceptualizing it.

[@sunnyclassroom24]

Thanks a lot for watching.

[@lenso2010]

Sunny always the best. Every topic you cover, you give best shots. Thank you

[@anibaldk]

Well, that was easy. Hands down, one of the best videos out there on the topic.

[@sunnyclassroom24]

Thanks

[@davidr.flores2043]

Professor. Very many thanks!!! Kerberos has so many parts and your easy to understand explanation made all thing scome together for me. I liked it and subscribed to your channel. Again, many thanks!

[@sunnyclassroom24]

You are welcome! Thanks a lot for your encouragement!

[@vishalt4682]

Thats a very nice & precise high level explanation for Kerberos. Thank you .

[@sunnyclassroom24]

You are welcome!

[@_dx_]

Dawg. You explained that so well in such simple terms. Thank you brother!

[@pytsr]

The graphics animations and demonstrations are very good and very easy to understand.... I like it. Thank you so much.

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Whenever stuck on any crypto topic Sunny is one point solution. You are awesome Sunny. Put more tech videos

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[@sunnyclassroom24]

Many thanks for your encouragement. I will try my best.

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Precise and best explanation before watching this video it is y difficult for me to understand this topic but now it's crystal clear.

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What an excellent explanation! What didn't I watch this video years ago?!

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u r the best // i wish all lecturers can emulate you . simple and plain

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the best explanation, clear and straight to the point

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Indeed after going through many videos, I find this explanation to be the best and easy to understand. Thanks a ton, you saved my day!! :)

[@sunnyclassroom24]

You are welcome!

[@mrlqchen]

This is the best explaination of the subject on youtube!

[@WanderingFriar]

Re-watched this a second time after a few days and now Get It. Thanks Sunny!

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Great explanation, simple yet connecting all the dots to understand the concept. Thank you!

[@sunnyclassroom24]

You are welcome! Thanks a lot for your encouragement. I will do my best!

[@beepboop8250]

Another great video Sonny, Thanks!

[@sunnyclassroom24]

You are welcome!

[@bazookaman7]

by far best example i have seen

[@sunnyclassroom24]

Thanks a lot for your great comment.

[@Pikwhip]

As a total newbie this helped me a lot. Thank you!

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great video! short, simple and very informative. Your videos really are helping me a lot in college. Greetings from Argentina!

[@sunnyclassroom24]

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Best clear explanation I have seen in KZbin, huge thanks sir

[@haritverma4050]

Dude this is the best video that I have seen. Awesome explanation.

[@salkeldeliaoe]

Thank you so much with the clear and consise explaination especially with the shared secret keys which i was confused about. Thank you once again sonny;

[@XunZhong]

Crystal clear in 6 minutes, fantastic job!

[@嘉然今天吃战斧牛-u1h]

Legendary explanation, we need more tutorials like this.

[@josuesainz227]

This is really great you just simplified a complex topic for me

[@joaquincuda5606]

Awesome explanation, I've been struggling a lot with Kerberos auth method, thanks for your vid!

[@akadubs8537]

Your examples and explanations are fantastic.

[@tahir8ify]

This is excellent explanation, thanks you so much for such a simple explanations. I was so confused before watching your video but now it is clear.

[@jerryjohn2655]

Sir you explain so well in detail i like your teaching style thank you so much

[@sunnyclassroom24]

You are welcome!

[@amoghkulkarni4512]

Set the video speed to 1.25 and thank me later :) Nice explanation. Thanks a lot

[@sarathbab]

Don't put unwanted comments, like speed. Slow learning is good for rememberence

[@amoghkulkarni4512]

sarathbab yes.. Sure you can use the slow learning approach.

[@dariustwin3393]

I set it to 2x and it worked for me.

[@adityamittal4357]

I remember better when I learn fast. If I learn slowly I get bored and lose track and forget everything. I watched lectures at 1x and 2x and then tried to write down what I remembered and had a much better recall when I watched at 2x.

[@tomasandersen35]

@@adityamittal4357 probably because you already had watched it in 1x speed ;) lol

[@omidsupply9550]

No better way to explain other than in very simple and straightforward & elaborative way..

[@CunningAndGuile]

Not gonna lie, I usually avoid all video explanations with a presenter that has a strong accent, it really throws me off. I know it's really just my problem because everyone else doesn't seem to have an issue with it except me. The hardest for me are the ones with Indian accents, just can't do it. Anyways, for the longest time I would see the Sunny classroom videos and just ignore them, but the comments were always so positive I decided to give him a try and boy am I glad that I did. Even with the accent, you have such a great way of explaining things, you really make complex subjects easy to understand which is what a good teacher does. Thank you for making the videos!

[@sunnyclassroom24]

Thank you very much, Moises, for your nice and encouraging words. I will do my best! I wish I could speak English better. Many thanks!

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Moises, I have a remediation for you. You need to either go to India and learn English in their accents. Secondly try the same to practice with Indian people without going there. I have seen many of my American friends they understand Chinese or Indian accents 100%. It needs some patience, which we had to learn English.

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watching this, cause i am going to give presentation on this tomorrow! thnx for simple explanation!!

[@sunnyclassroom24]

Best of luck!

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@@sunnyclassroom24 it went great and everyone understood it!

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Super! Really well explained. Concise, simple and easy to understand.

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Very nice and simple explanation . Thank you Sunny .

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I finally understand the concept completely!

[@sunnyclassroom24]

Great!

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WoW .. Network subject is abstract for me, but your videos makes sense out of it. Thank You for your videos. Quite informational. Wish I would have seen these videos during my collage days (long back)..

[@sunnyclassroom24]

Many thanks for your nice comments. I hope my videos are helpful to those who just start studying networking and cyber security.

[@lovinglifeenergy]

This explanation is excellent. It's clear and easy to digest. Thanks!

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Thank you so much sunny sir to provide this video......with the help of this video I can write on examination paper very well.......so thank you so much

[@sunnyclassroom24]

You are welcome!

[@aGalicious92]

Thanks for the explanation! It really helped me finally to understand, how kerberos works.

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Thanks Sunny, great presentation! 👍🏿

[@sunnyclassroom24]

My pleasure!

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I / We love you, Sunny! Your videos are well done and the explanations are on point every time, Sir! 💪

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this is the best explanation of kerberos . thanks so much🌟

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Thank you Sunny for this wonderful explaination🤗

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Really great video, thank you! 👍🏽

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i just love the way you explain stuff.. its simple and awesome thanks sunny

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the legendary sunny!!

[@sunnyclassroom24]

Thank you for watching!

[@PhamTony]

At 4:36, why is File Server encrypting the Token again? Isn't the Token already encrypted by TGS with Shared Secret with File Server?