# decapsulate(_:) Decapsulate a shared secret. ``` consuming func decapsulate(_ encapsulated: D) throws -> SymmetricKey where D : DataProtocol ``` ## Parameters `encapsulated` An encapsulated shared secret, that you get by calling [`encapsulate()`](/documentation/CryptoKit/MLKEM768/PublicKey/encapsulate()) on the corresponding public key. ## Return Value The shared secret. --- 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)