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cryptotokenkit

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Access security tokens and smart cards using CryptoTokenKit. Use when building TKTokenDriver or TKSmartCardTokenDriver extensions, communicating with smart cards via TKSmartCard/TKSmartCardSlotManager, using iOS 26+ NFC smart-card sessions, registering smart cards, querying token-backed keychain items with kSecAttrTokenID, monitoring TKTokenWatcher, or configuring certificate-based smart-card authentication.

When to use

• building TKTokenDriver or TKSmartCardTokenDriver extensions
• communicating with smart cards via TKSmartCard/TKSmartCardSlotManager
• using iOS 26+ NFC smart-card sessions
• registering smart cards
• querying token-backed keychain items with kSecAttrTokenID
• monitoring TKTokenWatcher
• configuring certificate-based smart-card authentication

When not to use

• passkeys/WebAuthn
• account sign-in
• Secure Enclave
• CryptoKit primitives
• keychain architecture
• certificate pinning
• trust policy

Skill page

Source