---
title: supportedIssuerKeyIdentifiers
framework: identitydocumentservices
role: symbol
role_heading: Instance Property
path: identitydocumentservices/mobiledocumentregistration/supportedissuerkeyidentifiers
---

# supportedIssuerKeyIdentifiers

A list of X.509 authority key identifiers that correspond to the document signer certificate chain for the mobile document.

## Declaration

```swift
var supportedIssuerKeyIdentifiers: [Data]
```

## Discussion

Discussion An issuer key identifier is an authority key identifier from the document signer certificate chain. warning: The number of issuer key identifiers must not exceed 1,000 and the size of each identifier must not exceed 64 bytes.