Integrity and Authenticity
问题 Sorry to keep asking so many questions, but you guys always seem to be so nice and helpful... I need to do some application that imports data from a file. For instance, user selects one file and the application imports some data to database. But I've been thinking, and this kind of app leads to a problem of integrity and authenticity of files. If a user changes the file the application is not allowed to use that information. And if one file is not from a source well known, the application can