<div dir="ltr"><div dir="ltr"><div class="gmail_default" style="font-size:small"><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, Aug 28, 2024 at 11:12 PM Christian Huitema <<a href="mailto:huitema@huitema.net">huitema@huitema.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
On 8/28/2024 4:57 PM, Phillip Hallam-Baker wrote:<br>
><br>
> Steganography just means a slight reduction in payload capacity. <br>
> instead of passing 1200 bytes of payload at a time, it would be maybe <br>
> 1140. So worst case 5%-10% reduction in bandwidth.<br>
<br>
That's not the figures that I am used to. The most common algorithm is <br>
to encode the hidden message in the least significant bits of an image <br>
encoding, but then the signal is occupying at most 10% of the bits. But <br>
this is kind of an upper bound. If I understand correctly , there is a <br>
whole body of research developing better steganography, and developing <br>
algorithms capable of detecting the presence of embedded messages. <br>
Everything else being equal, the higher the ratio of message to payload, <br>
the easier it should be to detect the presence of steganography.<br></blockquote><div><br></div><div><div class="gmail_default" style="font-size:small">Steganography is simply concealing the fact there is a message there.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">In a world where HTTP crossed the net unencrypted by default, twiddling the LSB of images was the best we can do.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">In a world where everything goes over QUIC, we can disguise an encrypted two way MOQ session as a HTTP/3.0 over QUIC session.</div><div class="gmail_default" style="font-size:small"><br></div></div><div class="gmail_default" style="font-size:small">Steganography has always been double ended, creating easier camouflage to hide in is just as valid as making use of the existing cover.</div></div></div>