---
title: importOnlyOne
framework: security
role: symbol
role_heading: Type Property
path: security/seckeyimportexportflags/importonlyone
---

# importOnlyOne

A flag that you set to prevent importing more than one private key.

## Declaration

```swift
static var importOnlyOne: SecKeyImportExportFlags { get }
```

## Discussion

Discussion Prevents the importing of more than one private key by the SecKeychainItemImport function. If the importKeychain parameter is NULL, this bit is ignored. Otherwise, if this bit is set and there is more than one key in the incoming external representation, no items are imported to the specified keychain and the error errSecMultipleKeys is returned.