Finecam Registration Code -

// 3. Secure persistence ------------------------------------------------------ private void SaveLicenseSecurely(LicensePayload payload)

// 1) Decode base64 segment that contains the digital signature // 2) Use the embedded public key (RSA 2048 or ECDSA P‑256) to verify // 3) Constant‑time comparison to avoid timing attacks finecam registration code

// e) Check expiration / feature flags if (payload.IsExpired) return RegistrationResult.Expired; if (!IsFeatureAllowed(payload)) return RegistrationResult.NotAuthorized; finecam registration code

// Trim, upper‑case, remove whitespace/hyphens as needed // Return null if characters outside allowed set are found finecam registration code

// Windows: DPAPI ProtectData (CurrentUser) // macOS: Keychain // Linux: libsecret or encrypted file with file‑system ACLs