[Cryptography] Licensing of cryptographic services in France

[Christian Huitema]

On 8/28/2024 4:57 PM, Phillip Hallam-Baker wrote:
>
> Steganography just means a slight reduction in payload capacity. 
> instead of passing 1200 bytes of payload at a time, it would be maybe 
> 1140. So worst case 5%-10% reduction in bandwidth.

That's not the figures that I am used to. The most common algorithm is 
to encode the hidden message in the least significant bits of an image 
encoding, but then the signal is occupying at most 10% of the bits. But 
this is kind of an upper bound. If I understand correctly , there is a 
whole body of research developing better steganography, and developing 
algorithms capable of detecting the presence of embedded messages. 
Everything else being equal, the higher the ratio of message to payload, 
the easier it should be to detect the presence of steganography.

-- Christian Huitema