ADL-1 One Time Pad Printer


SKU: ADL-1 Category:


One Time Pad (OTP) is an ‘old school’ tool and a method of encrypting messages.  As long as the actual One Time Pad is kept secure, the message will be unbreakable.  The challenge of using this method is generating truly random sets of numbers. It can be very time consuming and redundant.  The ADL-1 One Time Pad machine makes it as easy as the touch of a button, and it is FIELD PORTABLE!

If you would like to order by mail, instructions are here.

If you would like to purchase more than 1 ADL-1 please purchase each one individually.

Files and Support Information

Source code, schematics, etc… are available here.


NC Scout’s review on

See here for warranty information.


Size (W x L x H )

8.7 x 7.5 x 3.9 inches

Weight with paper and batteries:

2 lbs, 6 oz

External Power:

12 – 13.8 vdc. 2.1 mm center positive, 2 amps


2 18650 2400ma or better Li-Ion batteries, included.

Paper Specification:

2.25 x 1.5  inches (40mm) external diameter. No more than  2.5 mil (0.06 –  0.07mm) thick.

Battery Charger Information

The ADL-1 does not have an internal battery charger. Here is a list of some that will work.



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