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Main content
Current time:0:00Total duration:5:18

Video transcript

you've reached the first checkpoint in the journey to cryptography series and now I want to talk about what's next because I'm working on a new series however this one won't end here and if anything we're kind of at the beginning still so I'm going to do three different checkpoint videos this one is on advanced lessons however I also want to eventually talk about tests and challenges and what we can do with more interactive explorations and computer science lessons as it applies to cryptography but for now let's talk about advanced lessons and when I say advanced I don't necessarily mean harder lessons I mean more detailed and let me give you a conceptual idea for what I think these this series could be and future series I'd like to think of each series as the trunk of a tree where I took you from prehistoric times to around the 20th century which is here with a few different threads and these ideas kind of branch apart once you hit the 20th and 21st century they start getting highly specific and way down here on the leaves our current research questions which over here might be problems related to prime number distribution and over here some very specific work being done on randomized algorithms or hash functions and way up here we might have new public key protocols because RSA was just the first or we also have encryption standards such as DES and AES we would have a whole new branch on quantum cryptography so as you can see there's so many different things that branch out of this series and I couldn't possibly do justice to them all so I think of this video as living right here it's kind of a junction point now I could branch off with the help of the community and possibly other video creators to fill out this tree gradually over time specifically with the help of the community and I'm really excited about the question-and-answer community and the work being done to improve how people can help people on Khan Academy so for example in terms of what we're one of these branches can go I've noticed clusters of questions kind of leading into a common branch for example under the pseudo-random number generator I have two questions here one by sunny and one by direct ain dry Kane's question is why is he suggested that time and middles middle milliseconds is a suitable random seed this is a huge no-no in security the time it is on your machine is the time it is on my machine give or take 100 milliseconds which can be brute-force attacked and again a really this is a great question too because it speaks to the need that I didn't present a cryptographically secure pseudo-random generator so I the middle squares method is back here in the early nineteen or the early twentieth century but up till today we are not using the middle squares method and that's a whole interesting branch and it's these sort of questions which cluster together and really drive new content and I want to show you a really interesting example of how this has happened already this is a question Samuel asked on the one-time pad video he said wouldn't a computer be able to test all possibilities very fast and chump patrol basically asked the same question here and I see this happening a lot similar questions all speak to the need of a new video so I went and created a video on perfect secrecy which really nails down how you can't beat randomness in the world of encryption and out of this video dawn made a really great comment and what they did was basically summarize my video in two sentences so this is what I want to try to do more of and filling out these branches take questions make new content and have this kind of feedback loop and see what we what we can do so now what I would really love it is for you to ask questions below this video which arise after watching the entire series so not specific details about certain videos those can go with the videos but new questions which are kind of opening a new can of worms and what I think will be fun to do is your question will lead to answers by both me and the rest of the community okay so we'll have multiple answers and what I can do is take this body of answers and out of this draft up you know a rough script for more advanced videos on specific topics that you know subsets of the community cares about so hopefully out of the discussion below over time we can grow a bunch of new videos and I want to be clear this is an ongoing process so this won't happen tomorrow or next week I hope it can happen months and even years from now we can still be building out new videos off this series and these videos can be a collaborative effort between myself and the community and perhaps other video creators down the road so let me know what you think below and let's get started