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@matsukaz(Matsushita Masakazu)in株式会社カオナビ

NSUserDefaultsはセキュアじゃない

Posted at

という記事がわかりやすかったのでご紹介。

要約すると以下の通り。

  • NSUserDefaultsは暗号化もされずにplistで保存してるだけ
  • JBされたら閲覧も変更もできてしまう
  • JBされてなくても中身は見れちゃう（iOS 8.3以降は出来なくなったかも）
  • 購入したアイテムはレシートの方を保存して、あとから復元できるようにした方がいい
  • それ以外のデータは以下のいずれかの保存方法が良い
    1. KeyChainを使う
    2. Secure-NSUserDefaults などを利用して暗号化してNSUserDefaultsに保存する
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