CryptoTokenKit

Use CryptoTokenKit for token driver extensions, smart-card communication, token sessions, token-backed keychain integration, and certificate-based authentication in Swift 6.3 apps.

Platform availability: CryptoTokenKit classes are available across Apple platforms, but capability depends on extension point, entitlement, hardware, and OS version. The smart-card app extension flow for login/keychain unlock is macOS. TKSmartCardSlotManager.default is optional and returns nil unless smart-card access is enabled. iOS/iPadOS 26+ add NFC smart-card slots and registration.

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