...Applications can organize credentials by service, server, and access group. The library exposes Keychain accessibility controls that determine when protected information may be accessed. It also supports iCloud Keychain sharing, Shared Web Credentials, and Touch ID-related Keychain functionality on compatible systems. UICKeyChainStore works across Apple platforms including iOS, watchOS, tvOS, and macOS. A newer Swift-oriented successor called KeychainAccess is recommended for developers who want a more modern implementation.