Lecture 1: Introduction to Cryptography by Christof Paar

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  • Опубликовано: 3 окт 2024
  • For slides, a problem set and more on learning cryptography, visit www.crypto-textbook.com.
    The book chapter "Introduction" for this video is also available for free at the website (click "Sample Chapter").

Комментарии • 519

  • @kungisans
    @kungisans 8 лет назад +211

    I put youtube on autoplay, and woke up to this lecture...it's quite informative

  • @theanswer3sixers
    @theanswer3sixers 5 лет назад +85

    Prof. Paar I don't have the words to thank you enough for these lectures.
    I took Crypto as an optional module during my conversion MSc in Computer Science and I felt quite challenged/intimidated by the content. Your lectures helped me enormously and I felt very confident for the final exam where I ended getting a first class mark in a difficult examination.
    Thank you so much once again!

  • @waheedullahasghari5124
    @waheedullahasghari5124 5 лет назад +32

    Before and After graduating from my school up to now that am doing my Masters in Information Security, I had never ever attended such lecture from any professor in my entire life, It was really, really AWESOME.
    I really liked that due to the one who is giving lecture have a good knowledge of the topic, Huge love and thanks from Afghanistan, for sharing such lectures.

  • @mr.shanegao
    @mr.shanegao 3 года назад +121

    Classification 0:00
    basics/setup 18:00
    substitution cipher 47:00
    attacks 53:00

  • @the80386
    @the80386 9 лет назад +813

    whoever made the image stabilizer algorithm, please redo it...when you're not drunk.

    • @betlamed
      @betlamed 9 лет назад +56

      +zeebazu You know what would be cool? If the anomalies in the stabilisation were an encrypted message.

    • @douwehuysmans5959
      @douwehuysmans5959 6 лет назад +2

      Balmer peak bruh

    • @Tadesan
      @Tadesan 6 лет назад +3

      80386 go back to home-school.

    • @zackmarshall4217
      @zackmarshall4217 6 лет назад +2

      hahahaha

    • @jfangx
      @jfangx 6 лет назад +8

      RUclips is home schooling.

  • @1EddyG
    @1EddyG 10 лет назад +48

    Great lecture! Approximately 2 hours ago i had no clue such lectures on topics like these even existed! But for the part 1 hour 17 mins it feels like I've attended a lecture on cryptography! I feel great! Tomorrow or day after another lecture (Thumbs Up) !!

  • @aryansaeedi7618
    @aryansaeedi7618 Год назад +4

    You're the best thing that has ever happened to the U.S.'s education system!! thanks for saving many student's lives, sir!

  • @hassamrajpoot8397
    @hassamrajpoot8397 4 года назад +3

    So ,I downloaded a book for teaching me cryptography yesterday and I woke up today searching for a lecture and surprise surprise , it's the same man who wrote that book . The way he teaches has impressed me more than the book. Thanks.

  • @anasacmh
    @anasacmh 9 лет назад +11

    I'm Iraqi software engineering student in the last year, I have much interest in cryptography, these lectures will be useful to me 😊

  • @robberywills3257
    @robberywills3257 Год назад +7

    looking at this video really gives me the motivation I need for school. Honestly, thank you for this video.

  • @dingsanghacaspa3575
    @dingsanghacaspa3575 4 года назад +11

    Thanks mr christof for releasing this lectures on a platform like this where we can stream free.
    I am following from Cameroon.
    You inspire me Alot. Working hard to be like you.🙏

  •  8 лет назад +79

    "Who thinks this is secure and wants to be kicked out of this university", hahaha laughed at that part

  • @Shinta007
    @Shinta007 9 лет назад +8

    After this lesson, fell in love with Cryptology. Thanks for educating us!

  • @fernandoschuindt1665
    @fernandoschuindt1665 8 лет назад +290

    Learn Cryptography from a German guy, how cool is that?

    • @greywolf271
      @greywolf271 7 лет назад +19

      Even better would be going back in time and working with Alan Turing. Just when brute force attacks were beginning to shape the world

    • @fernandoschuindt1665
      @fernandoschuindt1665 7 лет назад +22

      and now you can learn why

    • @tabraizahmad7876
      @tabraizahmad7876 6 лет назад +1

      hahahahahahaha

    • @mohamedabdelkhalek4298
      @mohamedabdelkhalek4298 5 лет назад

      I think it will be cooler to learn it from English guy LoL

    • @KPater-mf4je
      @KPater-mf4je 5 лет назад +1

      @@simplepotato24 The ENIGMA was cracked even before Turing, by a team of Polish scientists. The Germans tried to improve the ENIGMA machine, and it wasn't long before the British cracked that as well.
      Sounds about as strong as a chicken-wire fence.

  • @jsw060943
    @jsw060943 8 лет назад +36

    Dear Professor Paar,
    This is my third lecture. I am so impressed with your series, and teaching style that I plan to go through the series. I have even bought your textbook. I am surprised that you did not talk much about the important historical implications of Crypto - the disastrous Zimmerman Telegram in 1917, Enigma, the British poem codes of WWII - that were so easily broken by German cryptanalysts - or the reuse of Soviet one-time codes, which led to revelations about the Soviet spy networks in the US and Britain. While you mention Enigma In your lecture, you don't even mention military or intelligence communication in the use of Crypto. During the war, my father (who had studied in Germany) was in charge of a US Army mobile crypto unit which was tasked to decrypt Wehrmacht radio traffic. The ciphers were changed daily. A Luftwaffe weather plane out of Norway broadcast the weather parameters from the North Pole every morning. The Allies sent a plane up to the North pole to get exactly the same information. Comparing the ciphertext to what was likely to be the plain text, it took my dad's cryptanalysts less than 20 minutes to break the cipher. This was so reliable that when the American Air Corp offered to shoot down the German weather plane, they were persuaded not to do so because of the value of the daily reports to the Allied cryptanalysts..
    Thank you for your excellent lectures. I love that you break into German sometimes, and even quote Goethe!

    • @KPater-mf4je
      @KPater-mf4je 5 лет назад +5

      That's interesting -- but it sounds very military-oriented. Might be a good idea for a lecture series on 20th-century military cryptography (don't military academies teach that? I'm not sure). You seem to have a lot of info on the subject, maybe collect more facts on the topic and present it to a lecturer or post it on a blog? It could be a great way for non-CS-students to be introduced to cryptography in a historical context.
      On Khan Academy, the lecturer sometimes goes into cryptographical history, but also gives visual examples of cryptography (as in, how some basic methods affect pixels in an image).
      It's a nice change from the usual dry crypto lecture (not talking about Paar's -- his series is great, was recommended to me by a fellow student).

    • @blackcanary8531
      @blackcanary8531 4 года назад

      @@KPater-mf4je are you learning from khan's academy?

    • @gracegrace8723
      @gracegrace8723 3 года назад

      I'm fortunate getting in touch with *Ronaldhacks01_ on ||πsta* and he made the recovery of my non spendable Bitcoin back to Spendable successfully. He's Legit,.,.

  • @Integralsouls
    @Integralsouls 4 года назад +3

    10 freaking years but still the best lectures on cypt. on u tube

    • @blake469
      @blake469 4 года назад

      Have you ever heard of "the kindle"??? lol

  • @sing759
    @sing759 7 лет назад +1

    i used to attend prof christof Paar's lecture once at RWTH Aachen,, he talked about how to decrypt satellite phone which was one of this students work .... so amazing... and I am still watching his 24 playlist lectures till now a day :) thanks Prof Paar

  • @TheMR-777
    @TheMR-777 Год назад +1

    I am a Computer Science graduate, currently planning to study abroad, specially in Germany or any other EU state. I always loved the cryptography, and once I learned about DES, and AES, they just blew my mind, and I love the diffusion they cause.
    I stumbled upon the 7th Lecture of AES, as Galois Fields were a bit of a mystery for me. That just hooked me up, and now I will watch the whole series IA.

  • @anusaxena971
    @anusaxena971 2 года назад +3

    Professor Paar, thank you so much for making these extremely interesting lectures. Your lectures make crypto ' within reach' !! In addition you sound a very brilliant person !!

  • @matt-g-recovers
    @matt-g-recovers 3 года назад +5

    This is outstanding. I am
    following with your textbook as I did/do Algorithms by Robert Sedgewick.
    I have a feeling, like that instruction, this will prove timeless.

  • @matterwiz1689
    @matterwiz1689 4 года назад +8

    When the lecture is in English and he hits you with that "Außendienstmitarbeiter"

  • @darkdante2k4
    @darkdante2k4 10 лет назад +7

    Thank you Professor Parr for these wonderful lecture videos. They help me greatly in my studies!

  • @czekiri
    @czekiri 7 лет назад +5

    The best course in cryptography : clear and easy to understand as the title of his book says it ! Thaks a lot herr professor !

  • @redelization
    @redelization 5 лет назад +3

    fantastic. anyone else with no formal computer science background and thinking about going into this field? I'm graduating history major with a major passion to learn!

  • @jithunniks
    @jithunniks 2 года назад +1

    Thank you Professor for this wonderlful lecture. I could not learn cryptography properly when I was in college. You gave me an opportunity to learn it once more.

  • @egonzalez4294
    @egonzalez4294 9 лет назад +385

    When you have to watch this because your educational system sucks :(

  • @kittie4269
    @kittie4269 2 года назад +1

    thank you prof. Parr. I have fallen in love with cryptology recently and this really helps grow my knowledge on the subject.
    -regards,
    A.C, Sep. 18, 2022.

    • @vgdevi5167
      @vgdevi5167 Год назад

      Same here, wha ru studying?

  • @nemesisc6122
    @nemesisc6122 6 лет назад +12

    Definition of cryptography here: 23:18

  • @66Narendra99
    @66Narendra99 9 лет назад +80

    Zee Germans are excellent!

  • @CryingMG
    @CryingMG 3 года назад +2

    Let's not forget that Germany invented the Enigma machine. Lots of brilliant mind there. Great series Mr. Paar. Will watch it all!:)

  • @D3w10n
    @D3w10n 9 лет назад +21

    This is really good lecture, I understood everything and I have only the basic knowledge of cryptography.

    • @D3w10n
      @D3w10n 4 года назад

      @@samuelfofana9752 programming

    • @MikhailFederov
      @MikhailFederov 4 года назад

      I mean he didn't go through any technical details. This is more of a ELI5 intro.

  • @hoshanggunner
    @hoshanggunner 8 лет назад +3

    Thanks to you, I topped in Cryptography in my college. :D

    • @hoshanggunner
      @hoshanggunner 3 года назад

      Graham Nichols I went on to be a software engineer in big data. And also did my masters in big data. I’d love to do my PhD under this professor.

  • @meganskelton7452
    @meganskelton7452 9 лет назад +3

    Thank you so much for releasing these, there are a massive help!

  • @vijayakumark5190
    @vijayakumark5190 7 лет назад +2

    Feel privileged to learn from such great teacher...Vijay from India

    • @125_yash6
      @125_yash6 7 лет назад +1

      Bro try nptel it's good too

  • @lordmushroom723
    @lordmushroom723 3 года назад +1

    I love how excited the professor is, I'd love to sit in that class 😆

    • @Teutathis
      @Teutathis 3 года назад

      His book is the go-to curriculum for learning Cryptography so Id be surprised if he wasn't excited xD

  • @slimjim178
    @slimjim178 9 лет назад +4

    After working in the field for a long time now, you do a great job delivering the details and your approach is very good. I particularly like your delivery of the material. With Cryptography being such a dry subject it isn't easy to deliver without being a little boring and you pull it off quite nicely sir.

  • @noormuhammadmalik6191
    @noormuhammadmalik6191 7 лет назад +2

    Love these, love the content, love the teaching. It's awesome! Thank you SO MUCH sir!

  • @debralegorreta1375
    @debralegorreta1375 Год назад

    Thank you for sharing your cryptology lectures with us, Professor Paar. Best regards.

  • @firstnamesecondname5341
    @firstnamesecondname5341 4 года назад +3

    Watching this in lockdown 2020 👍

  • @muhammadtariq2571
    @muhammadtariq2571 8 лет назад +1

    A genius professor i have ever seen in cryptography

  • @stand4reason
    @stand4reason 7 лет назад

    Thank you Dr Christof. Very enlightening, appreciated and helpful in EU-GDPR compliance work

  • @asherzyke
    @asherzyke 8 лет назад +86

    Dear lord, this is a university lecture not a French new wave film, what is with this unsteady camera?!

    • @lilxandiego6945
      @lilxandiego6945 6 лет назад +1

      Benjamin Z. i know but like you can hear him so it’s fine lmao it’s not like you need to see much.

    • @yc5117
      @yc5117 6 лет назад +4

      "video stabilization"

    • @Mindraker1
      @Mindraker1 5 лет назад +2

      The later lectures smooth out.

  • @smrititiwari8243
    @smrititiwari8243 6 лет назад +2

    thanks a lot.. I was reading from random sources and this simple yet beatiful lecture cleared all my doubts , I really wanna do all the vedios :)

  • @The4th-Man
    @The4th-Man Год назад +1

    wow.. i love this guy.. thank you Professor.

  • @f0restwow
    @f0restwow 2 года назад

    Well, this class I awesome. I remember getting though my Data Security Class in Masters with this. respect !!

  • @denisehill4115
    @denisehill4115 8 лет назад +2

    I really enjoyed these lectures. Thanks for uploading them.

  • @channalmath8628
    @channalmath8628 5 лет назад +4

    In the English literature, "Oskar" is "Eve" (for eavesdropper)

    • @KPater-mf4je
      @KPater-mf4je 5 лет назад

      In many German lectures it's usually Eve too (at our university, the professors would use either Eve or Eva). Not sure what Oskar would even stand for lol

  • @redditwisdom69
    @redditwisdom69 2 года назад +1

    nobody mentioned Cryptocurrency as an application of cryptography bcoz bitcoin was invented in 2009 and many people didn't aware of it

  • @jyotiumedbarekar3875
    @jyotiumedbarekar3875 6 лет назад +3

    Thank you so much sir ,the lectures are very useful and nicely explained.

  • @adrianabreu1565
    @adrianabreu1565 8 лет назад +1

    I really believe that you are a great teacher, great job.

  • @matrixstuff3512
    @matrixstuff3512 6 лет назад +1

    Maybe if I'm drunk the video will look normal?
    But the lecture is excellent, thank you for putting this online!

  • @rosesushmit5861
    @rosesushmit5861 Год назад

    Thank you, Mr. Paar. It's too cool. I love it. I'll express something in my native language. "সেরা"

  • @diencai1812
    @diencai1812 2 года назад

    Watching this in 2022! Thank you for making this available professor

  • @מישהגרשטיין
    @מישהגרשטיין 8 лет назад +1

    Thank you very much
    your lectures were both educational and fun to watch. You really made a difference for me

  • @marwamimouful
    @marwamimouful 7 лет назад +1

    thank you so much Mr.Paar for releasing your course on youtube, this is really helpful :)

  • @monicagothers1729
    @monicagothers1729 7 лет назад

    Thank you so much for your lectures!! Super helpful and love that I can find it on RUclips!!

  • @acidpunk7423
    @acidpunk7423 Год назад

    Thank you Professor Parr. Cannot afford classes at the moment and these are a monumental resource.

    • @kiit8337
      @kiit8337 Год назад

      Can a 12 th pass student understand this ...???

  • @denizokumus1777
    @denizokumus1777 5 лет назад

    Oscar enjoys these lectures very much.He learnt a lot.

  • @michalbotor
    @michalbotor 4 года назад +10

    "alice, bob, and"
    "ev..."
    "oscar"
    o.O

  • @Sarthak..942
    @Sarthak..942 4 месяца назад

    Prof. Christof Paar in Cryptography = Prof. Gilbert Strang in Linear Algebra
    (I really hope Prof. Paar reads this comment 🥺)

  • @haimkupershmidt4849
    @haimkupershmidt4849 3 года назад

    Excellent lectures! Danke sehr, Prof. Paar!

  • @inarifoxking
    @inarifoxking 8 лет назад +80

    That link in the bottom right seems to be drunk.

    • @sauer.voussoir
      @sauer.voussoir 7 лет назад

      Brady Kirkpatrick wtf hahaha

    • @prashantlal7483
      @prashantlal7483 6 лет назад

      How's that possible?

    • @ARV1999
      @ARV1999 4 года назад

      @@prashantlal7483 Whoever edited this film tried to use image stabilization, which produces this effect.

    • @TheQgamingChannel
      @TheQgamingChannel 4 года назад

      Anthony I think it’s the RUclips auto stabilizer that makes this so weird. When applying a stabilizer in Premiere Pro text will not be stabilized, only the footage.

    • @gracegrace8723
      @gracegrace8723 3 года назад

      @@TheQgamingChannel I'm fortunate getting in touch with *Ronaldhacks01_ on ||πsta* and he made the recovery of my non spendable Bitcoin back to Spendable successfully. He's Legit....

  • @Matt-xw1vv
    @Matt-xw1vv 7 лет назад +4

    Watching at x1.25 speed and feels so much more natural

  • @QuranRecitation-xo8vm
    @QuranRecitation-xo8vm 2 года назад

    i am Cse student from pakistan sir tomorrow is my paper and cryptography include in paper sir this vedio help me a lot thank u so much sir really appreciate the way u teach .....

  • @qweoiwjewiodc1954
    @qweoiwjewiodc1954 Год назад

    this is the reason because I love youtube , I was so interested in this topic for a long time and how I coulnt pay for go to this university I think this would be a good way to learn this topic.

  • @stefjwin
    @stefjwin 9 лет назад

    Really happy to have found these courses... auch gut wenn ich auf Deutsch lernen kann!

  • @kirtiseth9783
    @kirtiseth9783 9 лет назад

    Very very good and helpful lectures. Thank You Prof . to make these lecture freely available to the world thanks a lot

  • @caaussie1605
    @caaussie1605 3 года назад

    Thank you. Greetings from Australia 🇦🇺

  • @PolkiSaMalutkie
    @PolkiSaMalutkie 10 лет назад +1

    Very interesting, and well explained! Thanks for posting this series.

  • @dr.shemalatha7636
    @dr.shemalatha7636 6 лет назад +1

    prof. good explanation. concept is clearly understood.
    from india

  • @thebudkellyfiles
    @thebudkellyfiles 6 лет назад

    superb. Thank you. I am hooked on crypto. World class instruction for free!

  • @kevint615
    @kevint615 8 лет назад +1

    thanks a lot for uploading all the lectures. iam talking a cryptography class at the Arizona state University. your videos are helping a lot and very interesting to listen to. Ein wenig zu viel deutsch zwischendurch incorporated aber es kommt sehr gut rueber. Danke noch mal. subscribed

  • @alexba1771
    @alexba1771 10 лет назад

    Nice, I have seen all of your lectures! THX for this great job

  • @blackolotus
    @blackolotus 4 года назад

    My favorite professor in university.

  • @abbbb5625
    @abbbb5625 2 года назад

    The cardinality of the text substitution is not 26! but 26! - 1 as you have to remove the alphabet. if you do not want any letter to be substitute by itself you have then 25! instead.
    Nice course, thank you.

  • @simonfanuel6692
    @simonfanuel6692 5 лет назад

    helpful in most part and thank you for making it free and open to every everyone.

  • @bstemic3623
    @bstemic3623 3 года назад

    Thank you Herr Dr. Parr
    I enjoyed your lecture.

  • @LYehiaX
    @LYehiaX 4 месяца назад

    Thank you for your excellent cryptography lectures. They have been incredibly helpful for my studies. Could you please consider making videos on the new chapters about SHA-3 and post-quantum cryptography from the latest edition of your book?

  • @stevenvanhulle7242
    @stevenvanhulle7242 9 лет назад +3

    How narrow-minded do you have to be to first come up with GnuPG or Secure Shell when asked for examples of cryptography? The right examples are online shopping and internet banking, those cover probably over 99% of computer cryptography. (Measured in economic value)

  • @Mindraker1
    @Mindraker1 3 года назад

    59:38 there are other tricks, like bigrams and trigrams. (The frequency of not only single but double and triple letters.) So for example in English, "TH" and "THE" occur very frequently, but "ZX" and "QQX" would never occur.

  • @brz_tech6011
    @brz_tech6011 2 года назад

    Prof single handedly saving my degree

  • @markomus1
    @markomus1 Год назад

    Oscar. Tricky fellow. Also goes by, "Eve" (eavesdropping)

  • @wolfferoni
    @wolfferoni 3 года назад

    Unfortunately I can't watch this because I get so motion sick. Thankfully, the slides are on his website and I can just have the video playing in the background while writing notes from the slides. Thanks so much for these resources

  • @asesorestic
    @asesorestic 3 года назад +1

    Thanks for the free lesson. Gracias amigo :)

  • @TexasLonghorns115
    @TexasLonghorns115 8 лет назад +5

    Do you know professor Thomas Eisenbarth? he currently teaches Cryptography at the Worcester Polytechnic Institute at Massachusetts U.S.A, he got his PhD. in ECE from Ruhr University Bochum. :)

  • @aneeshprasobhan
    @aneeshprasobhan 4 года назад

    Thank you, great lecture. Our uni. professor recommended this lecture series.

  • @kirankumardhule
    @kirankumardhule 7 дней назад

    Thank you so much sir lot of love from india ❤

  • @arrowhead697
    @arrowhead697 6 лет назад

    Very informative and engaging lecture! Thanks!

  • @etnkishore
    @etnkishore 8 лет назад

    Thankyou very much sir for this wonderful series of lectures

  • @felipelopezhernandez2666
    @felipelopezhernandez2666 8 лет назад

    Thanks for share your knowledge .! Great course!

  • @PFFF785
    @PFFF785 5 лет назад +1

    Really nice and useful content, i’m really happy you had this brilliant idea, of recording this nice course! Thank you very much sir!

  • @rayhan3918
    @rayhan3918 8 лет назад

    Excellent teaching style. awesome

  • @spiritemporer9027
    @spiritemporer9027 6 лет назад +3

    I wish I was in the class I love cryptography

  • @nicholas123lotr
    @nicholas123lotr 10 лет назад

    Awesome lecture. i'll watch the rest back to back. keep up the good work

  • @warunausgoda
    @warunausgoda 7 лет назад +1

    Thank you sir. very very helpful to us .

  • @amypellegrini1732
    @amypellegrini1732 6 лет назад

    Awesome series! I will learn all this and record my own series on cryptography only to use different names than Alice and Bob in the examples... maybe Andrew and Brittany, I don't know.

  • @SupGhostly
    @SupGhostly 8 лет назад +5

    Thank you so much Mr. Paar for these lectures. will you be uploading other classes?

    • @introductiontocryptography4223
      @introductiontocryptography4223  8 лет назад +36

      +Jason Todd My tentative plan is record my lecture "Implementation of Cryptographic Schemes" in the winter semester 2016/17. The winter semester in Germany runs from October-early February. Regards, christof

  • @PamirTea
    @PamirTea 7 лет назад

    Thank you for the lecture series. I really appreciate it.

  • @QuantumEg
    @QuantumEg 8 лет назад +1

    You are awesome watching from Egypt :)

  • @hoangvo7290
    @hoangvo7290 6 лет назад

    Such an angel of Cryptography!