---
title: sec_protocol_metadata_t
framework: security
role: symbol
role_heading: Type Alias
path: security/sec_protocol_metadata_t
---

# sec_protocol_metadata_t

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
typealias sec_protocol_metadata_t = any OS_sec_protocol_metadata
```