# keyUsage An array containing usage attributes applied to a key on import. ``` var keyUsage: Unmanaged? ``` ## Discussion The array may contain any of the following key usage constants: - [`kSecAttrCanEncrypt`](/documentation/Security/kSecAttrCanEncrypt) - [`kSecAttrCanDecrypt`](/documentation/Security/kSecAttrCanDecrypt) - [`kSecAttrCanDerive`](/documentation/Security/kSecAttrCanDerive) - [`kSecAttrCanSign`](/documentation/Security/kSecAttrCanSign) - [`kSecAttrCanVerify`](/documentation/Security/kSecAttrCanVerify) - [`kSecAttrCanWrap`](/documentation/Security/kSecAttrCanWrap) - [`kSecAttrCanUnwrap`](/documentation/Security/kSecAttrCanUnwrap) If the array is `NULL`, all operations are allowed by default. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)