Just when you thought things couldn’t get nerdier, a DIY project like this comes along. Pass Key is the  password generator that is conveniently shaped like a candy bar making it the only portable gadget of its kind that I’ve seen.  It generates a 16-digit alphanumeric code as quick as you can press a button.

The project takes about two hours to complete and is moderately difficult. For $43 bucks in parts, you won’t find a cheaper hardware-based, portable password generator anywhere. Hell, you won’t find one period; do it yourself.
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