# MLKEM768.PublicKey A public key you use to encapsulate shared secrets with the Module-Lattice key encapsulation mechanism. ``` struct PublicKey ``` ## Topics ### Creating a public key [`init(rawRepresentation: D) throws`](/documentation/CryptoKit/MLKEM768/PublicKey/init(rawRepresentation:)) Initializes a public key from a raw representation. ### Accessing a key’s raw representation [`var rawRepresentation: Data`](/documentation/CryptoKit/MLKEM768/PublicKey/rawRepresentation) A serialized representation of the public key. ### Encapsulating a shared secret [`func encapsulate() throws -> KEM.EncapsulationResult`](/documentation/CryptoKit/MLKEM768/PublicKey/encapsulate()) Generates and encapsulates a shared secret. ## Relationships ### Conforms To [`KEMPublicKey`](/documentation/CryptoKit/KEMPublicKey) [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- 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)