<!--
{
  "availability" : [
    "iOS: 18.0.0 -",
    "iPadOS: 18.0.0 -",
    "macCatalyst: 18.0.0 -",
    "macOS: 15.0.0 -",
    "visionOS: 2.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "LocalAuthentication",
  "identifier" : "/documentation/LocalAuthentication/LADomainStateBiometry/stateHash",
  "metadataVersion" : "0.1.0",
  "role" : "Instance Property",
  "symbol" : {
    "kind" : "Instance Property",
    "modules" : [
      "Local Authentication"
    ],
    "preciseIdentifier" : "c:objc(cs)LADomainStateBiometry(py)stateHash"
  },
  "title" : "stateHash"
}
-->

# stateHash

Contains state hash data for the available biometry type. Returns `nil` if no biometry entities are enrolled.

```
var stateHash: Data? { get }
```

## Discussion\discussion If biometric database was modified (fingers, faces were removed or added), `stateHash`
data will change. Nature of such database changes cannot be determined
but comparing data of `stateHash` after different evaluatePolicy calls
will reveal the fact database was changed between the calls.

```
     the state of biometry has not changed.
```

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)