It's possible symmetric encryption may never really be defeated by anything other than brute force. The exchange of the ephemeral key really is the important part, as you mention. Thankfully looks like we are getting closer to full adoption of post quantum TLS... but that doesn't help recorded communications before very recently. Scary thought.
replyLooks like 70% of cloudflare requests are using post-quantum TLS! https://radar.cloudflare.com/post-quantum
> which governments around the world are just waiting to crack anonymous political speech by recording and saving for later
replyProbably not too many, because anonymous political speech from 10+ years ago isn't that interesting. Punishing people a decade after the fact isn't very effective for anything.
Activists 10 years ago are probably still linked to interesting people the government wants to survey though, even if they are maybe less active now
replyActivists typically aren't secretive about their actions, on the contrary they tend to be as public as they can safely be. The setup though might be, if it's to prepare an event that might be crushed down before it even take place, but then even a day later, not even a decade, to decipher would be too late and thus pointless.
reply> Punishing people a decade after the fact isn't very effective for anything.
replyIt sends a very clear message: even if it takes a decade, we will find you and punish you.
That’s not a message activists tend to care about though. In places where speech is dangerous enough for this to matter, there are usually far more immediate threats.
replyThe linked CADO-NFS Inria page makes no mention of GPUs, and nor does its downloads page, which makes me think that TFA's factoring was done purely on CPUs. If so, there could still be considerable speedup on the table!
replyThe CADO-NFS page gives some benchmark results for 16 threads, suggesting the algorithm parallelises at least somewhat well.
I didn't use any GPUs, but Steve Weis (who factored the final key at the bottom of the post) did. He's posted about that factoring setup over on https://x.com/sweis/status/2095570645505700165
replyMuskless link: https://xcancel.com/sweis/status/2095570645505700165
replyCPU?
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