They may as well ban all files of random data of unknown origin. If it passes diehard tests with flying colors, confiscate it and arrest all known possessors of it.
The point I'm trying to make is that in an oppressive regime the only thing that actually provides plausible deniability is having and using the exact same hardware/software as everyone else uses; a rooted phone with an opensource OS, unusual chat apps or cryptography tools won't give you any plausible deniability but actually make everything even more risky for you.
The point I'm trying to make is that in an oppressive regime the only thing that actually provides plausible deniability is having and using the exact same hardware/software as everyone else uses; a rooted phone with an opensource OS, unusual chat apps or cryptography tools won't give you any plausible deniability but actually make everything even more risky for you.