I have included IDEA.EXE, a simple encryption program for use in doing just this. It is not the best possible program, but it is adequate. See the idea.doc file for more info. Test your program on secret.gif. Hideseek 5.0 is completely backwards compatible with HideSeek 3.5 and later.
International patents are pending.
The GIF format is copyrighted by compuserve. Nevertheless , you may only use them at your own risk. I cannot and will not be responsible for lost data.