Writing
Engineering notes for the authorization boundary.
Detailed implementation guidance for teams shipping native software into environments they do not control.
What desktop license validation must keep server-side
A practical boundary for deciding what a desktop client may prove and what only your service should authorize.
Replay-resistant authentication for desktop clients
How canonical bytes, timestamps, nonces, body hashes, and device signatures work together to reject captured requests.
Device binding without punishing legitimate hardware changes
A device-key model that resists simple copying while giving support teams a controlled, auditable rebind path.
Authorize release links without becoming a file host
Using scoped file IDs, signed URL metadata, and pinned artifact hashes while release bytes stay on infrastructure the application owner controls.
Build against a boundary you understand.
Read the protocol guide alongside a functional reference client before adapting the integration.