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    <p>As @Hyperbole said, If you store the username and password in plain text it will be visible in the executable. It is extremely trivial to examine the executable for strings, and it's usually the first thing someone with malicious intent will try. </p> <p>Right click on any app you've downloaded in iTunes and select show in finder. Make a copy of the app on your desktop and rename the app from AppName.ipa to AppName.zip. Double-click to unzip it, and look inside the folder. Navigate to the folder Payload and then right click on the (probably only) file in there called AppName that looks like an application but has a big circle with a cross through it for the icon. Select show package contents. Scroll through until you find a file called AppName with no extension and a blackish rectangle with the green word "exec" as an icon. Open that file in text edit or another text editor. You'll find that most of this ends up being random symbols and other crap, but you should occasionally see some plain text. The compiler takes string constants and embeds them directly in the app when you compile it in most cases. </p> <p>You asked about what magazine apps and others do to access content - There are a ton of different ways to do it but off the top of my head, after the server verifies your in-app purchase receipt, the server would record an identifier specific to your iTunes account, saying that you've purchased a specific issue of the magazine. Then your app can request that file from the server, adding the identifier to the request in the process. The server would respond with the file once it looks through the database and determines that you've purchased the content.</p> <p>Other solutions include signing/hashing a unique key.</p>
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A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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