2 Replies
      Latest reply on May 31, 2018 12:32 AM by eskimo
      Pathogen Level 1 Level 1 (0 points)

        Hi,

         

        Typically I've used the keychain to store small things, like a password, for example.

         

        In a new app, a requirement is for the app data to be stored securely by the app and be able to survive an app delete/reinstall.

         

        I thought about user defaults but it is not secure even though the device itself has system-wide encryption, right?

         

        More importantly, user defaults gets wiped when the app is deleted, as does the Documents folder.

         

        So, now I'm thinking of the keychain...

         

        Basically, the user wants to do some analysis that must be protected and saved via the app. Length is probably anywhere from 500-1500 chars.

         

        My question is: Is saving that much text a misuse of the keychain?

         

        Thank you!

        • Re: Misuse of the keychain?
          KMT Level 9 Level 9 (12,705 points)
          • Re: Misuse of the keychain?
            eskimo Apple Staff Apple Staff (9,685 points)

            Length is probably anywhere from 500-1500 chars.

            Is saving that much text a misuse of the keychain?

            Storing a few KiB in the keychain is fine.  However, there is another serious problem to worry about here.  You wrote:

            In a new app, a requirement is for the app data to be stored securely by the app and be able to survive an app delete/reinstall.

            The keychain does not guarantee that data will survive when the app is deleted.  Please read this post for the details.

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