911 Moosic logic-locked design
911 : Moosic logic-locked design
- Author: Gabriel Gouvine
- Description: 8-bit counter locked with Moosic logic locking
- GitHub repository
- Clock: 0 Hz
- Feedback: ✅ 1
How it works
This is a simple counter that is incremented every time the first input bit is set.
The trick is that is it locked using logic locking, so that it won't work unless the proper key is set first.
How to test
You need to initialize the key with inputs "11100110" (or 0xe6). The 6 most significant bits (111001) are the key, and the second bit is the key enable. Then you can run the counter: "00000001" will increment it, while "00000000" will keep the same value.
External hardware
This is purely self-contained to demonstrate logic locking.
IO
| # | Input | Output | Bidirectional |
|---|---|---|---|
| 0 | DO_INCR | CNT_0 | |
| 1 | KEY_ENABLE | CNT_1 | |
| 2 | KEY_0 | CNT_2 | |
| 3 | KEY_1 | CNT_3 | |
| 4 | KEY_2 | CNT_4 | |
| 5 | KEY_3 | CNT_5 | |
| 6 | KEY_4 | CNT_6 | |
| 7 | KEY_5 | CNT_7 |
User feedback
- mattvenn: Without the pin, the design does nothing. Setting the pin and it will count at the clock frequency.