https://developer.apple.com/documentation/cryptotokenkit
CryptoTokenKit | Apple Developer Documentation
Access security tokens and the cryptographic assets they store.
apple developerdocumentation
https://developer.apple.com/library/archive/releasenotes/General/APIDiffsMacOSX10_11/Objective-C/CryptoTokenKit.html
CryptoTokenKit Changes for Objective-C
Describes the API changes between OS X v10.10.3 and OS X v10.11.
changesobjective