What is it?

It is a little carryable device, useful to hold your important secrets securely stored

Why did you make it?

Like everybody today i have a lot of passwords and i searched for a way to safely carry them around. There are lot of password managers around, but i dont trust mobiles too much. Installing games and apps make it prone to spyware, keyloggers and malware.

What makes it special?

The input of information can directly be done in the device with an virtual keyboard. As a consequence you can view the data on the device.

An nice gimmick is that you can plug the device to an computer where it will act as an HID-keyboard and you can push information out of the device.
An important thing is that the information will be PUSHED from the device, not pulled by the connected computer which make it extremly unlikely to steal information out of it, because the connected system have no control over the device.

Every information entered will be encrypted and stored on an micro-sd card. If you want to make a backup, just take out the sd-card and copy the content.

Feature List

Hardware Feature:

• PIC24FJ128GB204 Processor with hardware AES-encryption and true random number generator for good performance
• 1,77 inch TFT Color Display
• SD-Card slot
• Micro-USB port for charging and simulate keyboard
• 6 Buttons for comfortable input
• Case with lid to protect the display and turn the device quickly on and off to prevent strangers to spy at your data
• Small comfortable design 70x62x14mm

Software Features:

• 32.768 possible entries
• Search function
• 128-bit AES-encryption (practically uncalculateable, if someone manage to decrypt the data its the fault of a too easy masterkey and this is a problem over all algorithms)
• Data goes only encrypted on the SD-card
• Deleted data will be shredded on the SD-card
• Use masterkey for encryption and limited pin input for unlocking of the device
• Wrong input of pin cause masterkey to get deleted and make the data useless for attackers
• Disguised pin input for a little improved security
• Customizeable pinlength and tries
• Utilize of secured hardware keymemory to improve security against key stealing
• Use Fat32 Filesystem to allow backups with common SD-card readers
• Overall good performance of the interface by delta updating the display
• Customizeable color and brightness of UI
• Enable and disable of keyboard function to transmit selected data to PC/Tablet/Handy
• Comfortable virtual keyboard for writing
• Random generation of characters utilizing the TRNG to quickly create secure passwords
• TETRIS!

Further Information

The whole project can also be found on github as an open source project.
There you will find the sourcecode for the controller, the designfiles for the case, the KICad files for the pcb and more information