On: The mystery of steganography

I copied most of the implementation from the Go standard library. The actual diff required to implement the steganography is very small: https://github.com/lukechampine/jsteg/commit/d35a0bb4e6c545d...

Re-encoding the JPEG will destroy the hidden bits, so it's very fragile.

You can make it less fragile with a significant loss of bandwidth.