DIY Rotomolding

January 1, 2008 By 2 Comments


Rotomolding is used to create hollow forms by slowing rotating a mold while the material covers and hardens to the shape of the mold. [ds] built this version using a stepper motor to drive the assembly and a belt drive link An extreme version is used to form whitewater kayaks and other plastics. This thread over at cnczone has a … Read the rest

Filed Under: cnc hacks, misc hacks

24C3 Mifare crypto1 RFID completely broken

January 1, 2008 By 20 Comments

Another highlight for us at CCC was [Karsten Nohl] and [Henryk Plötz] presenting how they reversed Philips crypto-1 “classic” Mifare RFID chips which are used in car keys, among other things. They analyzed both the silicon and the actual handshaking over RF. Looking at the silicon they found about 10K gates. Analyzing with Matlab turned up 70 unique functions. Then … Read the rest

Filed Under: wireless hacks Tagged With: , , , ,