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WWDC25 · 20 min · System Services / Privacy & Security

Get ahead with quantum-secure cryptography

Learn how to protect your app’s sensitive user data from the emerging threat of quantum computing, and safeguard user privacy. We’ll explore different quantum attacks, their impact on existing cryptographic protocols, and how to defend against them using quantum-secure cryptography. You’ll learn how to use quantum-secure TLS to secure network data, and use CryptoKit’s quantum-secure APIs for securing application data.

Watch at developer.apple.com ↗

Transcript all transcripts

Chapters

  • 0:00 — Introduction
  • 1:18 — Quantum attacks
  • 4:49 — Quantum-secure cryptography
  • 8:56 — Protecting network data
  • 12:08 — Protecting custom protocols

Code shown on screen · 1 snippet

HPKE code sample swift · at 15:00 ↗ 
let ciphersuite = HPKE.Ciphersuite.XWingMLKEM768X25519_SHA256_AES_GCM_256

// Recipient
let privateKey = try XWingMLKEM768X25519.PrivateKey.generate()
let publicKey = privateKey.publicKey

// Sender
var sender = try HPKE.Sender(recipientKey: publicKey, ciphersuite: ciphersuite, info: info)
let encapsulatedKey = sender.encapsulatedKey

// Recipient
var recipient = try HPKE.Recipient(privateKey: privateKey, ciphersuite: ciphersuite, info: info, encapsulatedKey: encapsulatedKey) 

// Sender encrypts data
let ciphertext = try sender.seal(userData, authenticating: metadata)

// Recipient decrypts message
let decryptedData = try recipient.open(ciphertext, authenticating: metadata)
#expect(userData == decryptedData)

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