---
title: attestationObject
framework: authenticationservices
role: symbol
role_heading: Instance Property
path: authenticationservices/aspasskeyregistrationcredential/attestationobject
---

# attestationObject

The attestation object for this passkey.

## Declaration

```swift
var attestationObject: Data { get }
```

## Discussion

Discussion The relying party may use information in the attestation object to assess the origin of a passkey during registration.

## See Also

### Accessing credential information

- [clientDataHash](authenticationservices/aspasskeyregistrationcredential/clientdatahash.md)
- [credentialID](authenticationservices/aspasskeyregistrationcredential/credentialid.md)
- [relyingParty](authenticationservices/aspasskeyregistrationcredential/relyingparty.md)