Foil the NSA! With this device you can make One Time Pads and create cryptograms that are unbreakable if used correctly. The concept is simple. Create a string of random characters (that is where this device comes in). Share this string of random characters with a friend. Use the random string to encode a message. Your friend can decode the message using the random characters you shared earlier. If the random string is kept secret, it is theoretically impossible for anyone but you and your friend to read the message.

See wikipedia.org/wiki/One-time_pad for using one time pads.

Touch the sensor and the one time pad generator will display a random alphanumeric character 0 through 9 and A to Z! Draws only 4 microamps when not in use. And you will get a free CR1225 battery with each kit!

The kit uses advanced on-board entropy collection to generate real random characters. No inferior pseudo-random number algorithms are used. Each random character is created independently.

Includes:

• 1 - High Quality Lead-Free Professionally Printed Circuit Board 2"x2"
• 1 - Programmed ATTINY13A Microcontroller
• 15 - Red LEDs
• 1 - Battery Holder
• 1 - CR1225 Battery (included!)
• 1 - Assembly and Operation Instruction Sheet

Complete step-by-step assembly instructions can be found here.

Each part is clearly labeled on the printed circuit board for easy assembly. Soldering is required. All of the components are standard easy-to-work thru-hole type. Paper instructions for assembly and operation are included with each kit.

A great kit for a great price! This would be a fantastic parent child project.

You can easily adapt this kit to your own projects, so be creative!

This entire kit, hardware and firmware is designed and packaged by me, a professional engineer, in the USA. I would be happy to answer any questions you might have.

I almost always ship the same day or the next day an order is placed.

I also offer a combined shipping discount if you order more than one kit! Just add them to your cart to see the shipping price.

Thanks so much for looking!

P.S. Select the "Fully Assembled" option if making is not your thing, and I'll put it together for you myself!