# MLKEM1024.PrivateKey A private key you use to decapsulate shared secrets with the Module-Lattice key encapsulation mechanism. ``` struct PrivateKey ``` ## Topics ### Creating a private key [`static func generate() throws -> MLKEM1024.PrivateKey`](/documentation/CryptoKit/MLKEM1024/PrivateKey/generate()) Generates a new, random private key. [`init() throws`](/documentation/CryptoKit/MLKEM1024/PrivateKey/init()) Initializes a random private key. [`init(integrityCheckedRepresentation: D) throws`](/documentation/CryptoKit/MLKEM1024/PrivateKey/init(integrityCheckedRepresentation:)) Initializes a private key from an integrity-checked representation. [`init(seedRepresentation: D, publicKey: MLKEM1024.PublicKey?) throws`](/documentation/CryptoKit/MLKEM1024/PrivateKey/init(seedRepresentation:publicKey:)) Initializes a private key from a seed representation and optional public key. ### Inspecting a private key’s properties [`var integrityCheckedRepresentation: Data`](/documentation/CryptoKit/MLKEM1024/PrivateKey/integrityCheckedRepresentation) An integrity-checked representation of the private key. [`var publicKey: MLKEM1024.PublicKey`](/documentation/CryptoKit/MLKEM1024/PrivateKey/publicKey) The corresponding public key. [`var seedRepresentation: Data`](/documentation/CryptoKit/MLKEM1024/PrivateKey/seedRepresentation) The private key’s seed representation. ### Decapsulating shared secrets [`func decapsulate(D) throws -> SymmetricKey`](/documentation/CryptoKit/MLKEM1024/PrivateKey/decapsulate(_:)) Decapsulate a shared secret. ## Relationships ### Conforms To [`SendableMetatype`](/documentation/Swift/SendableMetatype) [`Sendable`](/documentation/Swift/Sendable) [`KEMPrivateKey`](/documentation/CryptoKit/KEMPrivateKey) --- 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)