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Remote control Pin Sentry
Using a standard SMS board from the internet
Some ribbon cable, a few gates , diodes resistors and some awful code ;) 
I can log into my internet banking, knowing my input device is in a secure location. If they had made the device a bit smaller, I would be tempted to carry it around with me, but it is the size of a 1970’s calculator. The output is decoded directly from the display driver, multiplexed sent to the SMS controller, which after authentication from my phone sends the code as an sms message.
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