Setting Up and Using Keychain
Keychain is part of the Security.framework and has been available for iOS starting with the initial SDK release. Keychain has its roots in Mac OS X development, where it was first introduced with OS X 10.2. However, Keychain’s history predates even OS X with roots back into OS 8.6. Keychain was initially developed for Apple’s email system called PowerTalk.
Keychain can be used to secure small amounts of data such as passwords, keys, certificates, and notes. However, if an app is securing large amounts of information such as encoded images or videos, implementing a third-party encryption library is usually a better fit than Keychain. Core data also provides encryption capabilities, and is worth exploring if the app ...
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