Not really. Tor, I2P, and Monero manage this just fine. Building on these technologies should allow one to have privacy and anonymity without any exotic quantum technology.
Well they don't actually, Tor especially has enormous amounts of government nodes so they can trace and log exactly what and who. And all of those still rely on the IP network which always will allow logging without you ever knowing, it's just math really, the proof of not-logged is just impossible.
Interesting, do you have a source? All fully p2p networks are vulnerable to sybil attacks to some extent, but specifically a source that Tor actively has enough "government nodes" to de-anonymize everything.
These technologies give privacy and anonymity under normal conditions, but they do not prevent anyone from logging ciphertexts. If someone has logged ciphertext, and the government subponies someone to divulge their private key and subponies whoever has the ciphertext, those ciphertexts as good as plain text.
I mean, I don’t think anyone really expects that encrypted messages are necessarily secure in context of stolen private keys. I assume that a lot of encrypted traffic is either recorded at the ISP/backbone level or at least can be on demand.
