---
title: "init(LogicalKeySizeInBits:EffectiveKeySizeInBits:)"
framework: security
role: symbol
role_heading: Initializer
path: "security/cssm_key_size-swift.struct/init(logicalkeysizeinbits:effectivekeysizeinbits:)"
---

# init(LogicalKeySizeInBits:EffectiveKeySizeInBits:)

## Declaration

```swift
init(LogicalKeySizeInBits: uint32, EffectiveKeySizeInBits: uint32)
```