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<concept id="GUID-C23196E8-FDD3-4A10-9DA2-DA83A2AD49D9" xml:lang="en"><title>Applications with a user interface</title><prolog><metadata><keywords/></metadata></prolog><conbody>

<p>If you are developing an application with a user interface,

consider the following issues:</p>

<ul>

<li><p>Other applications may have access to the information

that the user inputs.</p></li>

<li><p>A hostile application may lure the user to enter

information that belongs to another application.</p></li>

</ul>

<p>Password dialogs in particular should be designed so that the

user easily recognizes the currently running application.</p>

<section id="GUID-836A84FD-44E9-4C3F-AA50-4BC36CBA2916"><title>User

input</title>

<p>It is possible for the user to unintentionally enter incorrect

data that can interfere with the normal operation of the application.

All input should be checked and validated before processing. A one-time

check may not be enough because the content of data can change during

processing, so it is therefore advisable to quickly check the data

every time it is used.</p>

<p>The following figure shows an example of input processing phases.</p>

<p/>

</section>

</conbody></concept>