# init(compressedRepresentation:) Creates a P-521 public key for signing from a compressed representation of the key. ``` init(compressedRepresentation: Bytes) throws where Bytes : ContiguousBytes ``` ## Parameters `compressedRepresentation` A compressed representation of the key as a collection of contiguous bytes. --- 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)