The main thing is encryption. Before you write anything to the image you encrypt it. That way even if someone does manage to recover all of the bits that you w

The main thing is encryption. Before you write anything to the image you encrypt it. That way even if someone does manage to recover all of the bits that you write they still can't read them (because they're encrypted). So even standardized steganography will be as difficult to crack as the type of encryption that's used. But also, if you are encoding using the least significant bit (aka 1 bit per color channel per pixel) you can vary the order in which you encode the bits using the same password that is used for encryption. I've heard it's possible to detect least significant bit steganography using statistics (like we've noticed the red channel varies from neighboring pixels more than usual) but even if that is possible, and I absolutely have doubts about that, there isn't any way to recover the sequence of pixels or decrypt it.