jix' blog

Earlier this year, in October, a new widespread cryptography vulnerability was announced. The initial announcement didn’t contain details about the vulnerability or much details on how to attack it (updated by now). It did state the affected systems though: RSA keys generated using smartcards and similar devices that use Infineon’s RSALib. The announcement came with obfuscated code that would check whether a public key is affected. Also, the name chosen by the researchers was a small hint on how to attack it: “Return of Coppersmith’s Attack”. [Read More]

This is a write-up of the polygon renderer used for the Mega Drive demo “Overdrive 2” by Titan, released at the Revision 2017 Demoparty. As the Mega Drive can only display tilemaps, not bitmaps, and does not have the video memory mapped into the CPU address space, this turned out to be an interesting problem. If you have not seen the demo yet, I recommend watching it before continuing. You can find a hardware capture on YouTube:

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