22:46:30 <br-m> <yushanren:matrix.org> Hi guys, I have learned something about FCMP++, and I have a long confused question. Do old blocks quantum resistant? If hard fork happens, do I need to move my funds to a new wallet?
22:47:20 <br-m> <jpk68:matrix.org> FCMP++ is not quantum-resistant, but the Carrot key hierarchy (which will likely ship with it) has some quantum forward-secrecy benefits
22:49:30 <br-m> <yushanren:matrix.org> Okay, grok says the same. But what about the first question without considering fcmp++? Is there one way to keep privacy for old blocks?
22:49:36 <br-m> <boog900> FCMP++ adds a blindng factor to key images making them quantum private, as then a key image does not allow you to link what output spent it with a QC
22:50:15 <DataHoarder> > Is there one way to keep privacy for old blocks?
22:50:26 <DataHoarder> you already have exposed the necessary data for a QC opponent
22:50:32 <DataHoarder> you can't undo exposing it
22:50:54 <DataHoarder> you keep existing privacy set against non-QC
22:51:11 <DataHoarder> it's also not about the blocks but transactions.
22:51:45 <br-m> <yushanren:matrix.org> What is the best time to move funds? Do I have to?
22:51:51 <DataHoarder> read up/see https://github.com/jeffro256/carrot/blob/master/carrot.md, AI is likely to get it wrong due to the specifics/novel data
22:52:14 <DataHoarder> you don't have to. read that and see what the new wallet hierarchy would offer if you decide to transition
22:52:38 <DataHoarder> you won't be able to do before the upgrade happens, which is still quite a ways
22:53:05 <br-m> <yushanren:matrix.org> Okay
22:53:18 <DataHoarder> note a QC opponent would be able to still obtain old information on the specific cases before the upgrade, even if you move outputs elsewhere after
22:55:17 <br-m> <yushanren:matrix.org> If someone uses quantum computers to decrypt old blockchain data, what will he get? Everything or nothing?
22:56:47 <br-m> <yushanren:matrix.org> DataHoarder: It’s like the optional privacy part.