Convergent encryption without a user specific key has two weaknesses: 1. You can tell that the user posses a known file. Such as a pirated movie. This is what

Convergent encryption without a user specific key has two weaknesses: 1. You can tell that the user posses a known file. Such as a pirated movie. This is what this thread is about. 2. If the attacker knows the file except a sufficiently small secret part, they can learn that part. https://tahoe-lafs.readthedocs.io/en/latest/convergence-secret.html https://tahoe-lafs.readthedocs.io/en/latest/convergence-secr...