---
title: kCFStreamSocketSecurityLevelSSLv3
framework: corefoundation
role: symbol
role_heading: Global Variable
path: corefoundation/kcfstreamsocketsecuritylevelsslv3
---

# kCFStreamSocketSecurityLevelSSLv3

Specifies that SSL version 3 be set as the security protocol for a socket stream pair.

## Declaration

```swift
let kCFStreamSocketSecurityLevelSSLv3: CFString
```

## Discussion

Discussion If SSL version 3 is not available, specifies that SSL version 2 be set as the security protocol for a socket stream.

## See Also

### Constants

- [kCFStreamSocketSecurityLevelNone](corefoundation/kcfstreamsocketsecuritylevelnone.md)
- [kCFStreamSocketSecurityLevelSSLv2](corefoundation/kcfstreamsocketsecuritylevelsslv2.md)
- [kCFStreamSocketSecurityLevelTLSv1](corefoundation/kcfstreamsocketsecurityleveltlsv1.md)
- [kCFStreamSocketSecurityLevelNegotiatedSSL](corefoundation/kcfstreamsocketsecuritylevelnegotiatedssl.md)