DIY USB password generator

in PCBs, security, USB by the machinegeek | 2 comments


Benjamin Lunt writes to inform us of a small hardware HID project which for which he’s developed a PCB. The device design was created by Joonas Pihlajamaa (Jokkebk) and posted on CodeAndLife where it’s very popular. Joonas’ device is a small USB HID keyboard device that types a password stored in EEPROM every time it’s attached. As shown above, a new password can be generated just by tabbing CAPS LOCK a few times (4 times to start password regeneration and one tab for each password character generated, 10 is the default password length). The design is based on an ATTiny85 and a few resistors and zener diodes.

Ben went on to develop the PCB design be found on his website. Additional docs and pics can be found at CodeAndLife.

Via the contact form.

This entry was posted in PCBs, security, USB and tagged .

Comments

  1. Very cool! Would be an interesting experiment to implement a Hardware RNG using a zener diode as a noise source! I have some cryptographer friends and they get very picky about their RNGs ;)

  2. Alvin Chang says:

    Joonas has a new blog port about my project inspired by his DIY USB password generator at http://www.indiegogo.com/aladdin-key

    Come check it out!

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