This section contains information on the application of various restrictions, such as:
to the files that are selecting for the upload to your server. These restriction rules can be specified using the Restrictions class.
All the limitations specified with Restrictions are checked client-side, so you should not interpret them as a reliable protection. A potentially malicious user can bypass all these limitations (by emulating Image Uploader). This is why it is highly recommended to implement server-side verification of uploaded files in addition to Restrictions properties.
In other words, all the limitation features discussed in this topic should be used solely for the convenience of the user. They should not be interpreted as a serious protection measure from malicious users.