Physical object IS encrypted data carrier, carrying it in its shape. I could not find more detailed or software itself, however concept is intriguing and deserves attention and further exploration.
From source site:
Object Steganography, Noah Feehan (2012)
Steganography is the practice of concealing one form of information within the properties of another; it has been used as a way of hiding information in plain sight for thousands of years.
“Object Steganography” is a series of parametrically-designed 3d printed objects: the shape of each piece is determined by a user-submitted word.
For example, one of the objects pictured here is the most common password in the world; the other is an illegal number.
Further work in this series will close the loop between computer fabrication and computer vision: Each object will be scanned back into a programming environment and decoded.
|Object steganography software and .stl file generated|
Pictures of 3d printed objects with data in their shape:
|3d printed object with most common password data embedded in its form|
|3d printed object containing Illegal Number data encrypted in its shape|
http://p-dpa.tumblr.com/post/71516057042/object-steganography-noah-feehan-2012 via http://go3dprinting.tumblr.com/
I also googled it anf found a site that could be THE source: http://akamediasystem.com/2012/05/object-steganography/
There is a software project that encrypts .stl files: