---
title: OS_sec_protocol_metadata
framework: security
role: symbol
role_heading: Protocol
path: security/os_sec_protocol_metadata
---

# OS_sec_protocol_metadata

A sec_protocol_metadata instance conatins read-only properties of a connected and configured security protocol. Clients use this object to read information about a protocol instance. Properties include, for example, the negotiated TLS version, ciphersuite, and peer certificates.

## Declaration

```swift
protocol OS_sec_protocol_metadata : NSObjectProtocol
```

## Relationships

### Inherits From

- [NSObjectProtocol](objectivec/nsobjectprotocol.md)