The Tool Desk
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What Google Play Integrity checks
Play Integrity helps a backend assess whether a request comes from an app recognized by Google Play, whether that app has a Play entitlement, and whether the device meets specified integrity criteria. Its verdicts are separate claims: a positive result for one does not imply a positive result for the others.
App recognition: appIntegrity
PLAY_RECOGNIZEDmeans the app package and signing certificate match a version distributed by Google Play. It does not certify that the app’s code is secure or behaves benignly.UNRECOGNIZED_VERSIONmeans the package name or certificate does not match Google Play’s records.UNEVALUATEDmeans a prerequisite for evaluation was not met. It is not the same as a finding that the app is malicious.
Play entitlement: accountDetails.appLicensingVerdict
This field can return LICENSED, UNLICENSED, or UNEVALUATED. A licensed result indicates a Google Play entitlement, such as obtaining or updating the app through Google Play. It is an install-channel and entitlement signal, not proof of a person’s identity or a general fraud assessment. An unlicensed result can reflect sideloading or a lack of Play entitlement; it does not, by itself, establish harmful behavior. Google documents a caveat for some older devices: a user may remain licensed after uninstalling and later obtaining the same app elsewhere.
Device integrity: deviceIntegrity.deviceRecognitionVerdict
The device verdict can contain one or more labels, or no label if none of the criteria are met. MEETS_DEVICE_INTEGRITY denotes a genuine, certified Android device. For Android 13 and later, Google describes this label as including hardware-backed proof that the bootloader is locked and the loaded operating system is a certified manufacturer image.
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An absent label is not a diagnosis. Google lists possible explanations that include signs of attack such as hooking or root, an emulator that does not pass the checks, and other evaluation conditions. The result alone does not tell a developer which explanation applies.
Optional device labels
MEETS_BASIC_INTEGRITYis a weaker baseline. Its criteria allow a locked or unlocked bootloader and a verified or unverified boot state.MEETS_STRONG_INTEGRITYhas different requirements by Android version. On Android 13 and later, Google specifies a recent security update—within the last year across all partitions, including operating-system and vendor patches. On Android 12 and earlier, the label instead relies on hardware-backed proof of boot integrity and does not itself require a recent patch.
Check the Android SDK version before interpreting the stronger label. On Android 13 and later, Google says these optional labels are returned only for a licensed app.
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Optional environment and abuse signals
With the relevant configuration and prerequisites, Play Integrity can also provide signals about app access risk, Play Protect, recent device activity, and device recall. Availability is not universal: these checks are optional, can depend on Android version or eligibility, and may be unavailable when prerequisites fail.
- App access risk can flag other apps with permissions that could capture the screen, draw overlays, or control the device. It does not, by itself, prove that a specific app has abused those permissions.
- Play Protect can indicate protection status and the presence of known risky apps.
- Recent device activity provides approximate levels of integrity-token request volume for an app. It is an activity signal, not a device-wide security score.
- Device recall is a beta feature that can return app-defined device flags across reinstall or reset. Its beta status and eligibility matter when designing a control around it.
What Android key attestation verifies
Key attestation is a different mechanism from Play Integrity. It can increase confidence that an app-used key pair is stored in a hardware-backed keystore and provides encoded properties about that key and its attestation chain. It is not a complete inspection of the phone’s operating system, app, or user activity.
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Google’s Android Developers guidance, “Verify hardware-backed key pairs with key attestation,” calls for validation on a separate trusted server—not on a potentially compromised device. The relying party should verify the certificate signatures and trust anchor, check certificate revocation, and inspect the attestation extension. Only the first occurrence of the key-attestation extension in a chain should be trusted. A chain that has not been validated against a trusted anchor is not reliable evidence merely because it was returned by the device.
How the two mechanisms differ
| Question | Google Play Integrity | Android key attestation |
|---|---|---|
| What is primarily evaluated? | App recognition, Play entitlement, device labels, and configured optional signals | Properties of an app-used key and its certificate/attestation chain |
| Who interprets the evidence? | Google returns verdicts; the app backend validates request binding and applies policy | The relying party validates the chain, trust anchor, revocation status, and attestation extension, typically server-side |
| What limits the result? | Android version, Play state, configuration, and evaluation prerequisites | Hardware support and correct, trustworthy chain validation |
| What is a sound conclusion? | A risk signal for a protected action, not an all-clear | Evidence about key properties, not an all-device security score |
Neither mechanism necessarily answers broader device-posture questions. Google’s Android Enterprise guidance lists checks such as OS security patch level, encryption, management state, screen-lock quality, and developer-options state separately from Play Integrity.
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Why a pass is not a security guarantee
A verdict is evidence about the property it was designed to evaluate, within its prerequisites and limits. For example, app recognition does not inspect whether the recognized app has a vulnerability; Play entitlement does not establish the account holder’s identity; and a device-integrity label does not certify every app or action on that device. Key attestation is narrower still: it concerns an attested key and the properties encoded in its extension.
Google’s Play Integrity overview says: “The Play Integrity API works best when used alongside other signals as part of your overall anti-abuse strategy and not as your sole anti-abuse mechanism.” A server should therefore treat a verdict as one input to a policy, not as a universal safe/unsafe switch. Google’s reviewed official documentation does not provide a quantified real-world false-positive rate, bypass rate, or overall accuracy figure for these checks.
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How to use the signals in an application
- Define the protected action and the risk. Decide what you need to reduce—such as abuse of a sensitive endpoint—before selecting a verdict. Do not collect a signal simply because it is available.
- Bind the verdict to the request. Google recommends request binding to reduce tampering and replay exposure: use
requestHashfor standard requests or a server-managed nonce for classic requests. Values placed in either field are visible in cleartext to the app and Google, so encrypt or hash sensitive data rather than putting it there directly. - Verify on the backend. Check the returned request details against the original request and the action’s freshness requirements before applying a policy. For key attestation, validate the certificate chain, trust anchor, revocation status, and extension on a trusted server.
- Start with observation. Google recommends reviewing audience telemetry before enforcing a new policy. This helps show how verdicts behave for the app’s actual users and reduces the risk of unexpectedly excluding legitimate users.
- Choose graduated responses. Use tiers suited to the action: for example, allow, ask for additional verification, limit a sensitive operation, or deny when evidence and risk justify it. Where possible, give users an actionable way to recover from a decision.
- Plan for unavailable evidence. Distinguish a negative verdict from an unevaluated or unavailable one. Missing prerequisites, account or store state, environment conditions, and technical issues can affect results. Define a deliberate fallback instead of silently treating every missing result as either safe or malicious.
- Prepare for operational changes. Account for API disruption and revoked device attestation keys in monitoring and incident plans. Standard Play Integrity requests use caching and Play-managed protections; classic requests trigger a fresh assessment, have higher latency and use more user data and battery, and require developers to mitigate replay themselves.
Google characterizes standard-request latency as a few hundred milliseconds on average and classic-request latency as a few seconds on average. These are descriptions of API behavior, not measurements of security effectiveness; actual timing can vary.
What to conclude from a result
- A recognized app is one whose package and signing certificate match Google Play’s distribution records—not one certified as vulnerability-free.
- A device label describes criteria for that label and Android version; it is not a verdict on every component or activity.
- A key-attestation chain supports claims about the attested key only when the relying party validates it correctly.
- A missing or unevaluated signal needs context; its absence alone does not establish compromise.
These definitions reflect Google’s Android Developers and Google Play documentation as checked on October 4, 2026. Verdict definitions and optional-signal availability can change, so implementations should follow the current documentation for their target Android versions.
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