Device Integrity Verify that requests to your server come from a genuine Apple device running a legitimate instance of your app. DeviceCheck provides per-device bits for simple flags (e.g., "claimed promo offer"). App Attest uses Secure Enclave keys and Apple attestation to cryptographically prove app legitimacy on sensitive requests. Contents - DCDevice (DeviceCheck Tokens) - DCAppAttestService (App Attest) - App Attest Key Generation - App Attest Attestation Flow - App Attest Assertion Flow - Server Verification Guidance - Error Handling - Common Patterns - Common Mistakes - Review Checklis…