How does public key cryptography work – Gary explains

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[JimProng]

About a year ago I said, this is the best explanation of public key cryptography on the WWW, and I've still not found anything better.

[kamalphukan]

This is, without any doubt, the best explanation video on YouTube on this subject. Thanks a lot.

[samueltarley]

wow this guy is better than my information security professor

[ervinlabadero]

At 0:48, the big question is "How does the other party get to know the key?" At 6:15, you said, they both previously agreed on a one-way function. If they are also from different parts of the world and don't know each other, I am now wondering "How does the other party get to know the one-way function?"

[axelp-wm]

This video was awesome. I never thought modern encryption worked that way. I really learned a lot from both of your videos.

[markod]

wtf, this had no business being so well explained and suitable for academic consumption. Great job!

[KushagraJuneja]

Faith in learning gets restored when he says, "let me explain"

[hrithik]

I seriously wish my teachers knew as much as you do man!

[ChrisWMF]

I've seen other videos that explain it but don't explain the part about prime numbers. This is so much better.

[matanissler]

Thanks to you I understood better how public and private key works! Big shout out to Gray who he keeps working on these technical videos even thought they take a lot of energy to make and they aren't the most popular.

[pranavvij]

This is one of the best ever videos explaining public key encryption. Thanks a lot!

[entertainity]

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

[SrRunsis]

You are an expert explaining! You even took care of the small details that no one explains! Thank you! In 15 min u explained me something i couldnt understand for hours

[Motwera]

Quite useful as a summary for some of my ISS classes :p

[aqdhdzwty]

Gary is the most knowledgeable guy on Android Authority.

[sikz]

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!!

[petermainwaringsx]

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.

[JimProng]

This is the best explanation of cryptography I've come across. Thanks.

[hrmfa]

Thanks Gary. Much appreciated, even if it's quite complicated. 👍

[mrcet]

Aha! I honestly can’t recall whether I’ve heard the exact, specific mathematics behind RSA before. I knew and/or inferred the general gist of it, but it’s great to see the nuts and bolts spelled out here! Thanks.