It allows to import an SSH key. When doing that, the public key is stored in disc, and the private key is sent to Keychain (since iOS 7 or 8 encrypted with the

It allows to import an SSH key. When doing that, the public key is stored in disc, and the private key is sent to Keychain (since iOS 7 or 8 encrypted with the Secure Enclave), and only a reference is stored. In this way keys are not exportable or sent to the backup. We use UICKeyChainStore for that, and can check the code yourself too :)