---
title: "challenge(requestFlags:cryptoSuiteIdentifier:message:)"
framework: corenfc
role: symbol
role_heading: Instance Method
path: "corenfc/nfciso15693tag/challenge(requestflags:cryptosuiteidentifier:message:)"
---

# challenge(requestFlags:cryptoSuiteIdentifier:message:)

## Declaration

```swift
func challenge(requestFlags flags: NFCISO15693RequestFlag, cryptoSuiteIdentifier: Int, message: Data) async throws
```