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# VZVirtioEntropyDeviceConfiguration

A source of entropy for the guest’s random number generator.

```
class VZVirtioEntropyDeviceConfiguration
```

## Overview

Use a [`VZVirtioEntropyDeviceConfiguration`](/documentation/Virtualization/VZVirtioEntropyDeviceConfiguration) object to expose a source of entropy for the guest operating system’s random-number generator. When you create this object and add it to your virtual machine’s configuration, the virtual machine configures a Virtio-compliant entropy device. The guest operating system uses this device as a seed to generate random numbers.

Create a [`VZVirtioEntropyDeviceConfiguration`](/documentation/Virtualization/VZVirtioEntropyDeviceConfiguration) object and add it to the [`entropyDevices`](/documentation/Virtualization/VZVirtualMachineConfiguration/entropyDevices) property of your virtual machine’s configuration.

## Topics

### Creating the configuration object

[`init()`](/documentation/Virtualization/VZVirtioEntropyDeviceConfiguration/init())

Creates an entropy device configuration object.


---

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