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.

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WPA2 cracked ? posted March 2014

They say that this wireless security system might now be breached with relative ease by a malicious attack on a network. They suggest that it is now a matter of urgency that security experts and programmers work together to remove the vulnerabilities in WPA2

it is the de-authentication step in the wireless setup that represents a much more accessible entry point for an intruder with the appropriate hacking tools. As part of their purported security protocols routers using WPA2 must reconnect and re-authenticate devices periodically and share a new key each time.

In the meantime, users should continue to use the strongest encryption protocol available with the most complex password and to limit access to known devices via MAC address.

http://sciencespot.co.uk/wpa2-wireless-security-cracked.html

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Twitter is giving up on encrypting direct messages... posted March 2014

...At least for now.

This shows how unnecessary encrypting is sometimes. Some people like to encrypt and encrypt everything, and don't consider a solution "usable" if it not fully protected.

I'd argue that twitter has always been a very "public" and "exhibitionist" kind of websites where the private messages have never been a core feature (and it's actually not a really well done message system) and no user is obviously going to use it for "serious" matters. So why spend time encrypting it ?

http://www.theverge.com/2014/3/19/5523656/twitter-gives-up-on-encrypting-direct-messages-at-least-for-now

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Atom invites posted March 2014

I have two invites for the new IDE by github. I can't try it because I don't own a mac and there are no versions for windows at the moment (not even linux). Weird, but eh, if you own a mac and want an invite just ask me in the comments !

https://atom.io/

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Matt Whitlock - Elliptic Curve Cryptography, the Foundation of Bitcoin posted March 2014

Great lecture from Matt Whitlock, the video's quality is a bit off but the talk is really easy to understand and nicely paced.

And you can tell right away that he's a great educator: "I'll explain first why we use ECC, because in general I don't really understand things when I don't know how they're important" (not the exact words but you get the idea).

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