您可以使用iCloud传输数据，但这并不安全！将此数据加密保存在您的服务器上，让应用读取此数据将是一个解决方案. 顺便提一句.您不应将未加密的敏感数据保存在钥匙串中.越狱后，钥匙串的读取非常容易.

You can transfer data using the iCloud, but this is NOT really secure! Save this data ENCRYPTED on your server and let the app read this data would be a solution. Btw. you shouldn't save sensible data unencrypted in the keychain. The keychain can be read really easy after jailbreak.

有关处理敏感数据的更多信息，您可以阅读本书: 破解并保护iOS应用程序

For more information about handling with sensible data you may read this book: Hacking and securing iOS Applications