---
title: SSLProtocol.tlsProtocol1
framework: security
role: symbol
role_heading: Case
path: security/sslprotocol/tlsprotocol1
---

# SSLProtocol.tlsProtocol1

Specifies that the TLS 1.0 protocol is preferred but lower versions may be negotiated.

## Declaration

```swift
case tlsProtocol1
```