DoSWF Professional

DoSWF Professional is a lightweight Windows application built specifically for helping you encrypt your SWF files, obfuscate them so they become unreadable for other humans to interpret, as well as add watermarks.
DoSWF is able to encypt the actionscript code, sprites, images, sounds, and other important data in order to make your Flash files more secure.

Straightforward layout

You are welcomed by a clean feature lineup that allows you to easily configure the dedicated parameters. Files can be uploaded into the working environment using the built-in browse button, so you cannot rely on the “drag and drop” support.

Basic functionality

As soon as you run the program, you can view information about each SWF file, such as version, total frames, size, color, and FPS. You can encrypt SWF files and obfuscate data comprised inside of SWF files in order to prevent reverse engineering operations.
What's more, you are allowed to embed watermark by inserting custom text or images. Additionally, you may specify the watermark location (e.g. right-top, right-bottom, left-top) in the SWF file. Plus, you may use command-line operations. On the downside, there is no support for a previewing mode and different encryption algorithms.
During our testing we have noticed that DoSWF carries out a task very quickly. It is quite friendly with system resources, so the overall performance of the computer is not hampered.

Bottom line

To sun things up, if you are looking for a simple-to-use Flash encryption application, you can give DoSWF a try and see what it can do for you.