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# Prf

:::info
`Prf` is a re-export of ox's [`Prf`](https://oxlib.sh/api/Prf). Refer to the ox documentation for the full reference.
:::

Utilities for constructing credential-bound PRF configurations.

## Examples

```ts twoslash
// @noErrors
import { Prf, WebAuthn } from 'viem/utils'

const credential = await WebAuthn.getCredential({
  credentialId: 'oZ48...',
  prf: Prf.tag('account.1')
})
```

## Functions

| Name                | Description                         |
| ------------------- | ----------------------------------- |
| [`Prf.tag`](/docs/utilities/prf/tag) | Creates a credential-bound PRF configuration from a UTF-8 tag. |