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How does public key cryptography work – Gary explains

   May 1, 2021  31 Comments on How does public key cryptography work – Gary explains

How keys are distributed is vital to any encryption system. Find out how to do it with the Diffie–Hellman key exchange and using public-key cryptography. Find out more: https://goo.gl/qI6jxZ

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31 thoughts on “How does public key cryptography work – Gary explains”

  3. Ok what i'm still tripping on (Using Alice and Bob in my example) – I get that Bob's public and private key are mathematically linked.  However if Alice is across the globe how is her public and private linked to Bob.  So as I understand it, Bob will use his public key to encrypt a message and send to Alice which she uses  her private key to decrypt.   OK i'm fine with that. But how is Alices private key linked to Bobs key?     If Bob wants to send another msg, say to Tom – again he uses his public key to encrypt.  Tom uses his private to decrypt – how is Tom's key linked?  I'm missing something super basic here.  Any help appreciated

  6. Amazing explanation!. s the document with the detailed explanation still available somewhere? the link in the description unfortunately doesn't work (anymore).

  7. what are some common use cases for this kind of cryptography? Is Diffie-Hellman the most widely used by all encryption applications?

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  15. When he said: "Here comes the magic". It truly was a magic, cause I didn't have clue how he did it!? 🙂

    Great Video and the content! It took me 2 attempts to unterstand everything, and when someone asked to explain how Public and private key concept work I was stuck.
    My answer was: "check it on YouTube, then we can talk about it"
    Thanks for the video!!!!!!!!!!!

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  27. Thank you so much! I just spent an hour searching for this example, this is the first video that actually covered the part I wanted to understand, how the data is actually manipulated. Thank you!!

  28. Best explanation on this subject ever. I keep coming back for another look, change the numbers for ones I chose, do the math and find it always works. Trouble is, I still don't know for sure how! 😜 Thanks Garry.

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