---
title: socketSecurityLevelKey
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/stream/propertykey/socketsecuritylevelkey
---

# socketSecurityLevelKey

## Declaration

```swift
static let socketSecurityLevelKey: Stream.PropertyKey
```

## Discussion

Discussion The security level of the target stream. See Secure-Socket Layer (SSL) Security Level for a list of possible values.

## See Also

### Type Properties

- [dataWrittenToMemoryStreamKey](foundation/stream/propertykey/datawrittentomemorystreamkey.md)
- [fileCurrentOffsetKey](foundation/stream/propertykey/filecurrentoffsetkey.md)
- [networkServiceType](foundation/stream/propertykey/networkservicetype.md)
- [socksProxyConfigurationKey](foundation/stream/propertykey/socksproxyconfigurationkey.md)