Oct 09, 2017 3. Banktivity (formerly iBank) is a popular personal finance application with a desktop app for macOS. In fact Banktivity is designed exclusively for Apple devices and the only budgeting software for Mac which works across Mac, iPad, iPhone and even Apple Watch. Edit - For example, MAC address from the arp -a command. Of course I'm sure the $5000 box will have though about this, but a Raspberry PI open source build will have been analyzed to death.
The DEFCON badge this year was an impressive piece of hardware, complete with mind-bending puzzles, cap sense buttons, LEDs, and of course a Parallax Propeller. [mike] thought a chip as cool as the Propeller should be put to better use than just sitting around until next year so he turned it into a Bitcoin miner, netting him an astonishing 40 hashes per second.
Mining Bitcoins on hardware that doesn’t have much processing power to begin with (at least compared to the FPGAs and ASIC miners commonly used) meant [mike] would have to find some interesting ways to compute the SHA256 hashes that mining requires. He turned to RetroMiner, the Bitcoin miner made for an original Nintendo. Like the NES miner, [mike] is offloading the communication with the Bitcoin network to a host computer, but all of the actual math is handled by a single core on the Propeller.
Saving one core for communication with the host computer, a DEFCON badge could conceivably manage 280 hashes/second, meaning the processing power of all the badges made for DEFCON is about equal to a seven-year-old graphics card.
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