/System/Library/CoreServices/SecurityAgentPlugins/CryptoTokenKit.bundle/Contents/MacOS/CryptoTokenKit
CryptoTokenKit framework provides access to cryptographic tokens. Tokens are physical devices built in to the system, located on attached hardware (like a smart card), or accessible through a network connection. Tokens store cryptographic objects like keys and certificates.
/System/Library/Frameworks/CryptoTokenKit.framework/CryptoTokenKit
You use the CryptoTokenKit framework to easily access cryptographic tokens. Tokens are physical devices built in to the system, located on attached hardware (like a smart card), or accessible through a network connection. Tokens store cryptographic objects like keys and certificates. They also may perform operations—for example, encryption or digital signature verification—using these objects. You use the framework to work with a token's assets as if they were part of your system, even though they remain secured by the token.