# init(rawRepresentation:) Creates a Curve25519 private key for signing from a data representation. ``` init(rawRepresentation data: D) throws where D : ContiguousBytes ``` ## Parameters `data` A representation of the key as contiguous bytes from which to create the key. --- 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)