Request a calculation key by email, then paste it below.
This code arrives by email and expires quickly.
How this works
You can use a calculation key emailed to you, or a numeric key generated by generate-key. The page combines it with a device ID stored in your browser and your user-agent to derive a unique activation key. The formula is a one-way hash (SHA-256): anyone can re-run it if they have the same inputs, but it can’t be reversed to reveal your private values.
Generated key
Activate
Activate using your generated key (paste it below).