Revocation of digital certificates: CRL, OCSP, OCSP stapling

Digital certificate are normally expired after one year, but some situations might cause a certificate to be revoked before expiration. How does a client check the revocation status? Here I introduce three methods: CRL, OCSP, & OCSP stapling. What are they? How do they work? You would find answers in this video.
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Sunny Classroom

Пікірлер: 81

  • @MohenjinAdventure
    @MohenjinAdventure4 жыл бұрын

    I could not understand about CRL/OCSP/OSCP Stapling, but now I finally did. Thank you! You have been a great help!

  • @michaeljimenez239
    @michaeljimenez239 Жыл бұрын

    Just want to say, i used some of your videos to pass my network plus and currently doing th same with security plus. I always find your explanations easier to understand than most other instructors. Thank you!

  • @johnhart6320
    @johnhart63205 жыл бұрын

    As ALWAYS...your videos help me BIGTIME! Whenever I am in need of a CLEAR explanation on a technology that some other 'Off the Charts GEEK in the Weeds' tries to teach, I check and see if Sunny has a class to clear it up for me! Thanks Again Man!!

  • @sunnyclassroom24

    @sunnyclassroom24

    5 жыл бұрын

    Thank you, John, for saying nice things about my videos. You are welcome. I wish I would complete my whole series in this area (about 200 videos) soon.

  • @chengluo5956
    @chengluo59563 жыл бұрын

    Simple and clear, that's all I need. Thank you Sunny!

  • @lesleycouch9542
    @lesleycouch954211 ай бұрын

    I knew I could count on you to explain this concept clearly and concisely. I get it now! Thank you Sunny!

  • @nattiyar614
    @nattiyar6143 жыл бұрын

    This is by far the best explanation ever! Thank you so much!!

  • @jaydawg91
    @jaydawg912 жыл бұрын

    As always your videos are clear and provide accurate information. Thank you, Sunny.

  • @miriyalajeevankumar5449
    @miriyalajeevankumar54494 жыл бұрын

    The best content on this topic is your channel !!

  • @nkanakaraj
    @nkanakaraj Жыл бұрын

    Awesome! This is the exact info I was looking for to troubleshoot an issue related to OSCP. Sunny! you very well explained CRL, OSCP, and OSCP-Stapling operations in a quick video. Thank you very much!

  • @scottbiggs8894
    @scottbiggs88944 жыл бұрын

    Step 4, that all this happens "during the SSL/TLS handshake" was the puzzle piece I was missing. Thank you. And the music at end made me laugh. :)

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Thank you for watching!

  • @mimi7132

    @mimi7132

    3 жыл бұрын

    Exactly

  • @TheSukramb
    @TheSukramb4 жыл бұрын

    Truly awesome. Helps a lot because of your visualizations in addition to your explanation.

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Thank you for your time!

  • @TheAhamedabdul
    @TheAhamedabdul3 жыл бұрын

    Thanks a lot Sunny! this is very clear and useful.

  • @asoteico9528
    @asoteico95284 жыл бұрын

    Greatly done Sunny...!!! 🥇🎖🏅

  • @techlearner4806
    @techlearner48063 ай бұрын

    Simple and easy language/demo used in video. All thanks to you.

  • @johnnkoh2601
    @johnnkoh26014 жыл бұрын

    you are really good at explaining things. Thank you very much

  • @jilanishaik8791
    @jilanishaik87913 жыл бұрын

    It's very nice explanation. Thanks Sunny

  • @nicholasbarning8250
    @nicholasbarning82505 жыл бұрын

    Excellent videos, very concise and easy to understand. Thank you

  • @sunnyclassroom24

    @sunnyclassroom24

    5 жыл бұрын

    you are welcome!

  • @34521ful
    @34521ful5 жыл бұрын

    Hi Sunny, great video once again! I think one thing I'd add for future viewers is that another thing browsers like Firefox and Chrome do are just push a software update if a certificate must be revoked as soon as possible

  • @sunnyclassroom24

    @sunnyclassroom24

    5 жыл бұрын

    thanks a lot for your information. I appreciate it very much.

  • @poncho8887
    @poncho88872 ай бұрын

    Thank you for your clear explanations for our understanding.

  • @ayatarek6612
    @ayatarek66123 жыл бұрын

    Thank you so much this was very clear and helpful.

  • @okbazoueghi6714
    @okbazoueghi67143 жыл бұрын

    Great explanation!

  • @aziz421973
    @aziz4219735 жыл бұрын

    Very useful information, thank you so much.

  • @sunnyclassroom24

    @sunnyclassroom24

    5 жыл бұрын

    You are welcome, Aziz.

  • @marcosalameh8677
    @marcosalameh86772 жыл бұрын

    As usual soooooooo amazing!!!!!!!!!!!!!!!!!!!!!

  • @AmeenAltajer
    @AmeenAltajer3 жыл бұрын

    Clear explanation, thanks man!

  • @grahammattingley9784
    @grahammattingley97845 жыл бұрын

    Very helpful information - keep up the good videos and the good work

  • @sunnyclassroom24

    @sunnyclassroom24

    5 жыл бұрын

    thanks a lot!

  • @tim6925
    @tim6925 Жыл бұрын

    thank you, thats a very clear explanation.

  • @AyushmanAdhikary
    @AyushmanAdhikary2 жыл бұрын

    Great video. Thanks for the explanation.

  • @101appsCoZa
    @101appsCoZa4 жыл бұрын

    another great video tutorial. thank you so much

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Thank you!

  • @sonurocks341
    @sonurocks3414 жыл бұрын

    Great Videos. Very crisp explanation.

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Glad you liked it!

  • @dr.r.aravindhanm.eph.d1046
    @dr.r.aravindhanm.eph.d1046 Жыл бұрын

    Very Good Explanation

  • @jeremygunter9877
    @jeremygunter9877Ай бұрын

    Well done, thank you!

  • @livestronger1981
    @livestronger19813 жыл бұрын

    Great explanation

  • @mimi7132
    @mimi71323 жыл бұрын

    great explanation, thanks

  • @andreaszetea-ster900
    @andreaszetea-ster9004 жыл бұрын

    great work. Thank you

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Thanks

  • @ahmeddarwish3859
    @ahmeddarwish38592 жыл бұрын

    very good teacher.Thanks

  • @jasonhoi85
    @jasonhoi854 жыл бұрын

    thanks this is much clean then reading the text explaination

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Thank you for watching!

  • @HughJass-jv2lt
    @HughJass-jv2lt2 жыл бұрын

    Bravo!! ❤❤

  • @devendramhatre5007
    @devendramhatre50073 жыл бұрын

    Nicely Explained.... thank you sir

  • @sunnyclassroom24

    @sunnyclassroom24

    3 жыл бұрын

    You are most welcome!

  • @OmarJIBAR
    @OmarJIBAR2 жыл бұрын

    Beautiful 👌

  • @Drawmeafatcat
    @Drawmeafatcat2 жыл бұрын

    crazy how complicated other people make this when you just explained it in 6 mins.

  • @zowajoy7616
    @zowajoy76164 жыл бұрын

    You are awesome 🙏

  • @sunnyclassroom24

    @sunnyclassroom24

    4 жыл бұрын

    Thanks!

  • @fa307
    @fa307 Жыл бұрын

    great video, would be great if you could update this and make a video about certificate transparency (CT Logs)! :)

  • @jibnathgautamhy1280
    @jibnathgautamhy12804 жыл бұрын

    Thank you verymuch

  • @ravichanderkt326
    @ravichanderkt326 Жыл бұрын

    You're Gifted By God.

  • @dieglhix
    @dieglhix3 жыл бұрын

    All clear, thanks Mr. Subscribing now.

  • @sunnyclassroom24

    @sunnyclassroom24

    3 жыл бұрын

    Thanks for the sub!

  • @rajeshgeorge6093
    @rajeshgeorge60933 жыл бұрын

    thanks very much

  • @sunnyclassroom24

    @sunnyclassroom24

    3 жыл бұрын

    You are so welcome!

  • @kavi3841
    @kavi38413 жыл бұрын

    Thank you sir

  • @sunnyclassroom24

    @sunnyclassroom24

    3 жыл бұрын

    All the best

  • @corolla1209
    @corolla12094 жыл бұрын

    Hi Sunny, will you talk about SCVP in the future videos?

  • @mofogie
    @mofogie4 жыл бұрын

    well what if a domain spoofer simply forges a certificate?

  • @iyam1513
    @iyam1513 Жыл бұрын

    Thanks for your video, "OCSP stapling" is quite smart solution, but for how long does web server cache OCSP Response from CA? And for how long does the client (browser) consider that the response is still valid (I mean as for standards)? I think this is the point of "lag" between revocation and outdated signed OCSP Response from web server. So it is important to note.

  • @arber10
    @arber106 жыл бұрын

    Sunny, one more question: Which book(s) would you recommend for a deep dive in this topic? (I mean cryptography not just revocation.)

  • @sunnyclassroom24

    @sunnyclassroom24

    6 жыл бұрын

    It depends how deep do you want to go? If you are just for CompTIA security + , you can use Comptia security+ guide to network security fundamentals 6th edition or 5th edition (cheaper).

  • @arber10

    @arber10

    6 жыл бұрын

    Thank you. I will check this.

  • @ameenasif
    @ameenasif2 жыл бұрын

    So if an organization has issued certificates in thousands , and device1 comes with request , does webserver has stapled request for all thousand devices at that time , if its cached only on calls ? so when a signed response is received all it needs to do is verify certificate validity end date etc, no need to go to check revoked status as its trusted with cryptography i.e the signed response . is this right

  • @greenboy7484
    @greenboy74846 жыл бұрын

    hi sunny...can you explain how policy maping works in CA and sub-CA in another video?

  • @sunnyclassroom24

    @sunnyclassroom24

    6 жыл бұрын

    I put it on my to do list. Many thanks!

  • @deekusnotes3318
    @deekusnotes3318 Жыл бұрын

    Does it mean OCSP URLs no need to be added to firewall between client and server?

  • @sriksrik8184
    @sriksrik81843 жыл бұрын

    Hi Sunny, if the client from a ABC company domain accessing a website, how can it check the website certificates status from the ABC domains CA CRL list,,, does that mean that ABC domain CA will have constant updates, if so how,,,

  • @ishajain7020
    @ishajain70205 жыл бұрын

    When certificates are stolen from CA, why those certificates need to be revoked. I mean we are already certificates, but harm stolen certificates will make.

  • @sunnyclassroom24

    @sunnyclassroom24

    5 жыл бұрын

    Browsers make sure that all certificates are valid. It is like someone stole your credit card, and you want to report to your credit card company to revoke it. Otherwise, the thief will use your credit card. The same thing.

  • @RajivKumar-ee7xv

    @RajivKumar-ee7xv

    3 жыл бұрын

    @@sunnyclassroom24Here I have a question, Private key of stolen certificate is always with the owner for whom CA issued certificate. So other details are always public. What was stolen from CA for that particular certificate?

  • @chadsexinton
    @chadsexinton2 жыл бұрын

    Yea but browser and other clients no longer check the crl or ocsp servers so revocation is useless .

  • @richardturk7162
    @richardturk71624 жыл бұрын

    Great explanation but I still have no idea what you are talking about.