---
title: "sec_protocol_options_set_peer_authentication_required(_:_:)"
framework: security
role: symbol
role_heading: Function
path: "security/sec_protocol_options_set_peer_authentication_required(_:_:)"
---

# sec_protocol_options_set_peer_authentication_required(_:_:)

## Declaration

```swift
func sec_protocol_options_set_peer_authentication_required(_ options: sec_protocol_options_t, _ peer_authentication_required: Bool)
```

## Parameters

- `options`: A sec_protocol_options_t instance.
- `peer_authentication_required`: Flag to enable or disable mandatory peer authentication.

## Discussion

Discussion Enable or disable peer authentication. Clients default to true, whereas servers default to false.