Programmable USB dongles

Question

Where can I buy a programmable USB dongle that supports C as a development language?

Answer 1

1. Senselock
2. rockey
3. Aladdin

We use Senselock in our application. It is a smart dongle, that you can download your custom code into it. The way it works is that instead of just checking the presence of a dongle, your code should expect a correct output from the dongle emitted from your code inside the dongle.