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/luke

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/d35a0bb4e6c545d4f1dd2a28eee514228dab3409 https://github.com/lukechampine/jsteg/commit/d35a0bb4e6c545d... Re-encoding the JPEG will destroy the hidden bits, so it's very fragile.