david wong

Hey! I'm David, cofounder of zkSecurity and the author of the Real-World Cryptography book. I was previously a crypto architect at O(1) Labs (working on the Mina cryptocurrency), before that I was the security lead for Diem (formerly Libra) at Novi (Facebook), and a security consultant for the Cryptography Services of NCC Group. This is my blog about cryptography and security and other related topics that I find interesting.

I talked at the NCC Group open forum posted June 2016

I was at the offices of Braintree this evening, talking about the history of TLS, backdoors and Diffie-Hellman. If you missed it, my paper was released a few days ago and this is the talk that is packaged with it =)

braintree atrium

my colleagues and I preparing the event in the beautiful atrium of Braintree


starting the talk!

Someone asked me for the slides, you can find them on the github repo. You can find the .keynote file as well containing videos (but you need osx).

I'll be looking into submitting this talk to conferences, if you have any idea where I'll be happy to hear suggestions =)

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Has this talk been recorded? :)


unfortunately not :(
if I get another opportunity to give it maybe it will


Please do!
I really like your videos / presentations! :)


Before getting more credit for that paper (and accompanying talks), you should update it to mention that you learnt about its core "contributions" from the answers to questions asked by yourself on the Cryptography StackExchange site in February. [1,2] Currently, the paper creates the illusion that the methods described in the paper were (a) novel, or (b) your own ideas. As documented by those very crypto.SE postings, neither is the case. You do not want to plagiarize others' work, do you?

[1] https://crypto.stackexchange.com/q/32415
[2] https://crypto.stackexchange.com/q/32522


non: for what is worth, the research is mine. Core ideas where taken from many different places (the same ideas of that stackexchange were also exchanged by other people on r/crypto and HN). I've had many discussions with the poster in that SO link you posted and consider him as the supervisor of this research. He was asked if he would like to be a co-author of the paper and he declined. The paper does note his help :)

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