Applications use security intents when there is a need to protect access to data and services or a need to protect the data transferred between clients and services.
当需要保护对数据和服务的访问时，或需要保护客户端和服务之间传输的数据时，应用程序将使用安全意图。
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For the former, you probably already know the contents of the protocol, but you may want to get a more detailed look at the actual data being transferred, for example, when using web services.