---
title: bits128
framework: cryptokit
role: symbol
role_heading: Type Property
path: cryptokit/symmetrickeysize/bits128
---

# bits128

A size of 128 bits.

## Declaration

```swift
static var bits128: SymmetricKeySize { get }
```

## See Also

### Using standard key lengths

- [bits192](cryptokit/symmetrickeysize/bits192.md)
- [bits256](cryptokit/symmetrickeysize/bits256.md)