[sillysaurus2]

There are two possibilities. Either you've created a tool which enables people to covertly send messages without being detected, which every publicly-released stego tool thus far has failed to do, or you haven't.

Have you spent much time researching why current stego tools have all failed? The way you're endorsing this makes it sound like you haven't, and you're putting people in danger by pretending like law enforcement is incompetent.

Remember, law enforcement somehow managed to acquire an image of Silk Road's server, even though they were running it as a Tor Hidden Service, and they also managed to recover >100k bitcoins from DPR. All of this was done through forensics. Are you claiming that this tool is secure against such an adversary?

Hopefully someone will write a program called "DissidentXDetector" before law enforcement does. The myth that this generates undetectable messages needs to be debunked before people start trusting this.

[infinity0]

From the README:

Q. Can someone detect that a file has messages encoded in it?

A. That depends on the encoding used and the properties of the file the data is being encoded in. There's a whole field of academic literature on steganography, none of which is invalidated by this code. What this code does is vastly simplify the implementation of new steganographic techniques, and allow a universal decoder and encoding of multiple messages to different keys in the same file.

[sillysaurus2]

The README should read:

Q. Can someone detect that a file has messages encoded in it?

A. If the file was generated with an encoder whose code is public (i.e. Github, bitbucket, ...) then yes. Always. And even if the code is private, it may not be secure. Unless you come up with an encoding scheme that's never been thought of before, then law enforcement will likely be able to detect the encoded messages unless they're trivially short.

[TheLoneWolfling]

You're assuming that there isn't a shared secret between the sender and reciever.

[zzzeek]

random peanut gallery thought....mentioning "law enforcement" in the README itself might open up the tool itself to legal attacks, no ?

[nl]

No

[eliteraspberrie]

I have been working on a new steganography algorithm that I believe is secure. I plan to make it open source in the new year. Would you like to review the design and code when it is released?