# signature(for:) Generates a MLDSA65 signature ``` func signature(for data: D) throws -> Data where D : DataProtocol ``` ## Parameters `data` The data to sign ## Return Value The MLDSA65 signature ## Discussion> Throws: If there is a failure producing the signature --- 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)