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Agreed, though that would require a lossless format (e.g. png) and would limit exchanges to sources that don't change the image (e.g.as email attachment) but no

Agreed, though that would require a lossless format (e.g. png) and would limit exchanges to sources that don't change the image (e.g.as email attachment) but not social networks that resize or otherwise reprocess the image

anfractuosity 9y ago
You don't have to use a lossless format for steganography, for example: 'Statistically Undetectable JPEG Steganography: Dead Ends, Challenges, and Opportunities' http://dde.binghamton.edu/tomas/pdfs/Pev07-ACM.pdf http://dde.binghamton.edu/tomas/pdfs/Pev07-ACM.pdf