Hashing, Hashing Algorithms, and Collisions - Cryptography - Practical TLS

2024 ж. 22 Мам.
59 606 Рет қаралды

Hashing, or a Hashing Algorithm takes "something" (a message, a file, a certificate, computer code, anything) and turns into a smaller, representational sample of the original something. The result of a hashing algorithm is known as a Digest (among other names).
To check if two files are perfectly identical, you can simply run them both through a hashing algorithm and compare the digests. If the digests are the same, then you know both files are also identical. In the rare cases that multiple files result in the same digest... you have what's known as a Collision. And while rare, collisions are unavoidable.
This lesson is a free sample lesson from the the most effective TLS and SSL training course ever created. No instructor rambling on about pointless stories. No slides with massive walls of text. No time wasting. Only simple, effective, and precise explanations. Complimented with practical illustrations and visuals.
🔐 More details about the course:
classes.pracnet.net/courses/p...
🏢 Do you configure or troubleshoot TLS/SSL for work? If so, I'm willing to bet your employer would happily pay for this SSL training. Reach out if you'd like to coordinate an introduction for a bulk license purchase with your company. I'm happy to provide a generous referral bonus =)
00:00 - Hashing Algorithms - Definition & Simple Explanation
01:42 - Real World Hashing requirements
04:20 - Hashing Demonstration with Linux - md5sum
07:48 - Hash Collisions - Unfortunately, they can't be avoided
10:18 - Hashing Algorithms: md5 sha sha1 sha2 sha224 sha256 sha384 sha512
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  • 👉 *More free lessons:* kzhead.info/channel/PLIFyRwBY_4bTwRX__Zn4-letrtpSj1mzY.html ✨ *Full course:* pracnet.net/tls 💲 *Coupon Code* for 50% off: youtube50

    @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • No words can do justice to the clarity of your explanations. It is simply amazing. Thank you Sir.

    @dwaynesinclair2155@dwaynesinclair21552 жыл бұрын
    • Thank you for the kind words, Dwayne. You're very welcome.

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • I have learned more from you than any of my expensive classes. Please keep making contents. you were born to teach Sir. Very very talented!

    @karanvyas5155@karanvyas51552 жыл бұрын
    • Glad you're enjoying my content, Karan. =) Could you do me a favor? Do you mind sharing this video on Linked In, Reddit, Facebook, or any other social media you use? As an independent creator, that would be an _enormous_ help, and I would appreciate it _greatly_ .

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
    • This is the first video I've seen of this channel but I have a feeling I will soon feel the same way.

      @Davidc10@Davidc109 ай бұрын
  • I love the way you teach us. Please continue the rest part of TCP.

    @diptiranjansahoo5278@diptiranjansahoo527810 ай бұрын
  • I have learned more from you than any of my classes. Please keep making contents. you were born to teach. Very very talented!

    @ManhwaRecapMaster@ManhwaRecapMaster2 жыл бұрын
    • Thank you for the kind words, Mingmar. Glad you enjoyed this content.

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • This was immensely helpful visualizing the way the algorithms work, their limitations, and described the components that make one up. Great work! I'm excited to check out your other stuff!

    @Nicrophelia@Nicrophelia Жыл бұрын
  • You are a blessing to this generation, honestly.!!!

    @adedejiemmanuel1@adedejiemmanuel12 жыл бұрын
    • indeed!

      @cssssp2192@cssssp21922 жыл бұрын
  • You guys make the best videos on this app, simplifying complex topics within minutes. Thank you!

    @VictoriaOtunsha@VictoriaOtunsha Жыл бұрын
    • You're welcome again, Ogiri. Glad you are enjoying this.

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • I have taken many online courses (both free and paid) but I can confidently say that this is by far the most thorough yet simple. I am not a network professional, just a programmer. But your explanation of these concepts has been very clear to me. It's not hard to see your passion for your craft. I think anyone whose job has something even slightly to do with this should definitely take the full course. You are a genius of a teacher.

    @jephthahefereyan7431@jephthahefereyan74315 ай бұрын
  • You videos are too simple to got the point for me sir. Thanks alot.

    @pyaephyothaw10107@pyaephyothaw101072 ай бұрын
  • Thank you for this series!!!

    @user-gu5lu6rs8x@user-gu5lu6rs8x2 жыл бұрын
  • Brilliantly articulated. Thank you very much kind sir for your positive input into the universe.

    @universalponcho@universalponcho Жыл бұрын
    • Thanks for the kind note, Jamey. Glad you enjoyed it =)

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • simple and clear teaching. thanks will always come here

    @DerrickAwayevoo@DerrickAwayevoo Жыл бұрын
    • Thank you, Jenny, glad you enjoyed it.

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • Explained in very easy manner. Appreciate your efforts.

    @rahmalh@rahmalh Жыл бұрын
  • I have watched and studied your Networking Fundamentals series guide and found it very clear and comprehensive

    @thatman2132@thatman21322 жыл бұрын
    • Thank you =). Glad you enjoyed it!

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Thank you sir for the deep dive lessons, I am motivated to learn more through your courses.😁

    @jervyqe@jervyqe Жыл бұрын
  • Just a small note, by piping the output of echo command to md5sum you also take a new-line character (hex value 0A) into account to produce the MD5 digest. Use -n flag with echo command to omit the new line and you'll get the pure MD5 hash of the string "hello", or you can just use "printf" command in stead of "echo". P.S. Love your content, please keep up the great work you're doing for the community.

    @x0rZ15t@x0rZ15t Жыл бұрын
  • Excellent tutorials, thank you!

    @geyvandova@geyvandova2 ай бұрын
    • You're welcome

      @PracticalNetworking@PracticalNetworking2 ай бұрын
  • Another well-explained lesson. Thanks.

    @JoeBlac@JoeBlac2 жыл бұрын
    • Thank you, Joe. You're welcome =)

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Excellent and really useful. Thank You for putting together wonderful videos.

    @vilasrao8664@vilasrao86642 жыл бұрын
    • You're welcome!

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • This was an amazing explanation.

    @armandocastro3841@armandocastro3841Ай бұрын
    • You're very welcome =)

      @PracticalNetworking@PracticalNetworkingАй бұрын
  • Thank you so much for this video, learnt alot from this 🙏🏼🙌🏼❤️🌸

    @Tendo_27@Tendo_27 Жыл бұрын
  • SSL and TLS course? Awesome!

    @rafaelhenriquemachado3367@rafaelhenriquemachado33672 жыл бұрын
    • Indeed =)

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Great work

    @stundogha4947@stundogha49479 ай бұрын
  • Thanks for uploading video

    @arishkhan8325@arishkhan83252 жыл бұрын
  • Very good video.

    @IliyaDamyanov@IliyaDamyanov7 ай бұрын
  • Thanks so much , very good tutorial

    @realnanact@realnanact2 жыл бұрын
    • Thank you, Daniel!

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Thanks for this video.

    @Atom-Mercury@Atom-Mercury Жыл бұрын
    • Glad you enjoyed a lot of this content, Zino. You're very welcome. CHeers !

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • Cheers. Nailed it 👌 👏

    @Don-Carillo@Don-Carillo2 жыл бұрын
    • Thanks Don, glad you enjoyed it =)

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Self-teaching myself through these🖤

    @Aya-rk6yp@Aya-rk6yp2 жыл бұрын
    • Congratulations Aya! You won one of the free course giveaways. Reach out to me on Discord to claim your prize =) pracnet.net/discord

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Thank you!

    @nnarkozz_music@nnarkozz_music Жыл бұрын
    • You're welcome! =)

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • thanks!

    @maxmaster9908@maxmaster99082 жыл бұрын
  • I have been waiting for this since the announcement for the TLS series.. the first comment :)

    @piratevv@piratevv2 жыл бұрын
    • Congratulations Vigneshwar! You won one of the free course giveaways. Reach out to me on Discord to claim your prize =) pracnet.net/discord

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
    • @@PracticalNetworking woohooo

      @piratevv@piratevv2 жыл бұрын
  • Thanks a ton

    @surendras5853@surendras58532 жыл бұрын
    • You're welcome!

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Thanks

    @freeEgyptian@freeEgyptian7 ай бұрын
  • The simplicity is unreal, thanks a lot, it feels weird to be getting this for free, a lot of paid courses do not explain things clearly and simply like this. Thank you. Do you have any course on Udemy?

    @tund3_@tund3_ Жыл бұрын
    • I have some courses on Udemy, but most of that content is available on KZhead, specially with a membership to my channel. Alternatively, I have courses on my own platform: classes.pracnet.net. But reach out to me on Discord and I'll hook you up with discounts. =)

      @PracticalNetworking@PracticalNetworking2 ай бұрын
  • Perfect

    @thefutureforme9765@thefutureforme976511 ай бұрын
  • thanks

    @AkumaNoKuma@AkumaNoKuma Жыл бұрын
  • Powerful

    @frempongadarkwa2232@frempongadarkwa22322 жыл бұрын
  • Thank you

    @ayradizem2770@ayradizem27702 жыл бұрын
    • You're welcome!

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • I am one of the first to be here. I have been monitoring since 2 am. This is a great video as you represent.

    @adedejiemmanuel1@adedejiemmanuel12 жыл бұрын
  • Best tutorial. Could you just make a video on explain the difference between ssh & ipsec with packet exchange? And why ssh is not used for site to site vpn

    @vinesh7665@vinesh7665 Жыл бұрын
  • I used to know how to do all this👁️. Getting my game back for personal reasons hehe🤗

    @Chosen_1k@Chosen_1k4 ай бұрын
    • You can do it!

      @PracticalNetworking@PracticalNetworking3 ай бұрын
  • This video was exactly for my noob ass. Thanks!

    @RealityCheck6969@RealityCheck69697 ай бұрын
  • Had you consider to make some videos anout Wireshark?

    @iliandrei1408@iliandrei14082 жыл бұрын
    • Yes. One day. It would be great fun =)

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • Great tutorial Ed. Which made me want to checkout your full course. but I was a bit disappointed seeing the price 297 USD. I am not saying your course is not worth such a high price, but such a high price does make it less accessible to the common public. Maybe lowering the price Or selling it on udemy would increase your sales exponentially ? Anyways thanks for this free video. Cheers.

    @syscopio3452@syscopio3452 Жыл бұрын
    • Glad you enjoyed this video. There is a discount code in the pinned comment that will make the course more affordable =)

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • So let me check this. If I send you a message and the hash reads 11111 and you know which algorithm I used then you can decipher my message in reverse, yeah? But what about collisions? In theory my message could be the other message that also contains 11111.

    @catmando1786@catmando17862 жыл бұрын
    • 11111 is only a 5-bit hash (5 digits, 1 or 0 each digit). That means there are only 64 possible hash digests. Which means there will be A LOT of collisions. All the modern hashing algorithms use much, much higher bit length. MD5 (often considered the least secure hashing algorithm) is 128 bits. I unpack collisions in more detail starting from 07:50 onwards.

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • is it possible for you to make one big project in practical explaination in one vedio Full CCNA? 1.saparete DHCP server 2.saparte DNS server/ couple of websites to be included 10 3.using different connecting media/ voice over ip 4.how https,FTP, Smtp Etc.. work on 7th layer with respect to TCP 5.Routing of in OSPF , RIP2, Eigrp, redistribution in real time 6. NAT and ARP and layer2&3 switch 7. variable length subnet mask if needed 8.CSMA/CSMD in switch and frame check sequence 9.packet travelling in real time using encapsulation using mesh topology. thank you

    @vishalreddy9566@vishalreddy95662 жыл бұрын
    • Ooph, that would be one very long video =). A lot on that list I've already covered elsewhere. I posted all my CCNA related content here: www.practicalnetworking.net/index/ccna/

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
    • @@PracticalNetworking yeah me too out of my senses asking like that 😀 . Funny

      @vishalreddy9566@vishalreddy95662 жыл бұрын
  • Teachers like you should be famous.. instead of tiktokers and influencers 😢

    @nizziness@nizzinessАй бұрын
    • @PracticalNetworking@PracticalNetworkingАй бұрын
  • SHould be the digest should be 7 and original message is 8. It is because it produce the same digest result.

    @khongmunhing6948@khongmunhing69482 жыл бұрын
    • I'm not sure I understand your question.

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
    • @@PracticalNetworking it is my bad. you can ignore it. After i have watching it again. Thanks.

      @khongmunhing6948@khongmunhing69482 жыл бұрын
    • @@khongmunhing6948 No worries. You're welcome =)

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
  • :)))))))))))))))

    @farhadplace@farhadplace Жыл бұрын
    • :)

      @PracticalNetworking@PracticalNetworking Жыл бұрын
  • are first two requirements the same??

    @datvuong7420@datvuong74206 ай бұрын
  • Thank you !

    @addie8171@addie81712 жыл бұрын
    • Welcome!

      @PracticalNetworking@PracticalNetworking2 жыл бұрын
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