---
title: DCDevice
framework: DeviceCheck
role: symbol
role_heading: Class
platforms: [iOS 11.0+, iPadOS 11.0+, Mac Catalyst 13.1+, macOS 10.15+, tvOS 11.0+, visionOS 1.0+, watchOS 9.0+]
path: devicecheck/dcdevice
---

# DCDevice

A representation of a device that provides a unique, authenticated token.

## Declaration

```swift
class DCDevice
```

## Mentioned in

Accessing and modifying per-device data

## Overview

Overview Use the shared instance of the DCDevice class to generate a token that identifies a device. Call the generateToken(completionHandler:) method to get the token, and then send it to your server: if DCDevice.current.isSupported { // Always test for availability.     DCDevice.current.generateToken { token, error in         guard error == nil else { /* Handle the error. */ }

// Send the token to your server.     } } On your server, combine the token with an authentication key that you obtain from Apple, and use the result to request access to two per-device binary digits (bits). After authenticating the device, Apple passes the current values of the bits, along with the date they were last modified, to your server. Your server applies its business logic to this information and communicates the results to your app. For more information about server-side procedures, see Accessing and modifying per-device data. note: To use the DCDevice class, your app must have an app ID that you register on the Apple Developer website. Apple records the bits for you, and reports the bits back to you, but you’re responsible for keeping track of what the bits mean. You’re also responsible for determining when to reset the bits for a given device; for example, when a user sells the device to someone else.

## Topics

### Getting the current device

- [current](devicecheck/dcdevice/current.md)

### Determining API support

- [isSupported](devicecheck/dcdevice/issupported.md)

### Getting a device token

- [generateToken(completionHandler:)](devicecheck/dcdevice/generatetoken(completionhandler:).md)

## Relationships

### Inherits From

- [NSObject](objectivec/nsobject-swift.class.md)

### Conforms To

- [CVarArg](swift/cvararg.md)
- [CustomDebugStringConvertible](swift/customdebugstringconvertible.md)
- [CustomStringConvertible](swift/customstringconvertible.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [NSObjectProtocol](objectivec/nsobjectprotocol.md)

## See Also

### Device identification

- [Accessing and modifying per-device data](devicecheck/accessing-and-modifying-per-device-data.md)