ChoJin’s Quarter
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Archive for the 'Reversing' Category

On Influenza A

Just a small post to point to an article bunnie [1] wrote about the virus Influenza A : On Influenza A by bunnie.
This article should be of interest for people with a background in computer sciences but little knowledge in biology. It offers some funny/interesting computer sciences comparisons which should be of pedagogic interests for […]

Back to Basics: Reverse Engineering of a Non-Standard Magstripe — Part One

Hello,
I think it’s time I go back to basics and post something a little bit technical on this blog, which was the original intent of this blog anyway, should I remind everyone .
So we’re going to talk about magnetic cards. We all have at least half a dozen of them, if not more, and […]

Chaos Communication Camp 2007 Documentary Video

Here is a nice video of the CCC Camp 2007 which took place last summer.
Chaos Communication Camp 2007 Documentary Video
(here is an alternate link if this one is too slow)
The mood and general feeling were just incredible there. While watching, you could pay attention at 00:24:30 for instance *cough*
Furthermore, you’ll find very good […]

Reversing HotOrNot For Fun And No Profit

So I was bored the other day, browsing HotOrNot and particularly intrigued and interested by their new feature, the live chat.
I was wondering how they implemented it, and if it would be possible to exploit a security bug to live chat with anyone. So of course, I started a little reversing session!

Contents:

Decompiling the live [...]

Links of the week 1

As Promissed here is a small list of interesting or funny links for this week:
Articles and News:

YouTube exposes torture in Egypt (direct link to videos: http://youtube.com/watch?v=8c1QfFiLDDI, http://youtube.com/watch?v=5QFSN8fyYHM, http://youtube.com/watch?v=r0-rQr6Np7A, and http://youtube.com/watch?v=ZQom4edkHkw

Colorblind Test
HD-DVD Volume Unique Keys Discovered (although I really don't see what is so extraordinary about it)
Upside-Down-Ternet (having fun when a neighbor is stealing [...]

BackupHDDVD Released - A tool to decrypt AACS

It seems that someone is looking for fame.
Check this thread out: BackupHDDVD, a tool to decrypt AACS protected movies.
If you want my opinion, the video is a little bit too marketing oriented to my taste. Especially given what the software is doing. After all, it seems to be just an implementation of the AACS specs. [...]

New side-channel attack on RSA

Here is a very interesting article about a new side-channel attack on RSA, entitled On the Power of Simple Branch Prediction Analysis.
Definitively worth the read!

Ring0 under Microsoft Windows 9x

For the posterity, this is the translation of an old article I wrote in 2000. Of course since most people don't use Microsoft Windows 95 or 98 anymore, this article is somehow outdated. Nonetheless, it can still have some interests for those who are interested in low level programming and reverse engineering on x86 architecture.
I'll [...]

DVD Jon hacks Media Player file encryption

Apparently DVD Jon continues to have fun: he reversed the Microsoft NSC file encryption.
Sometimes I have the feeling this is not fair. Through the DeCSS trial, he got a sort of immunity, which allows him to reverse pretty much anything for interoperability. Don't get me wrong, that's very good, but anyone should be allowed to [...]