I've decided to upgrade my project, Stego, conceived as  an
   easy-to-use, near-universally available, maximally browser compliant,
   message PGP encrypted, steganography web app, to encode JPEGs, the most
   universal image format today (in cell phone cameras, and all over the
   web). Which means I have to decipher information-dense papers, pick a
   suitable algorithm, and code it up in client-side Javascript. Which
   greatly increases the workload, but I expect I'll be a better engineer
   for it. It also means that I'll be reusing none of the original code.
   Fortunately there are a few open source Javascript JPEG libraries. I'm
   writing to ask for help with picking the stego algorithm, hoping that
   someone here has a knowledgable opinion.
   Romana Machado
   310-940-7888