Profile: 2bc1cc92...

Replying to Avatar waxwing

https://github.com/kayabaNerve/fcmp-ringct/blob/develop/fcmp%2B%2B.pdf

New paper from some Monero researchers (really new it seems - update date is last week!), in which they're proposing to use CurveTrees (the same construct I put into aut-ct as per my recent work) to get much larger anonymity sets (and I do mean *much larger*, from like 10ish to 100000000!).

One very notable thing (to me) is that the very easy and natural secp/secq 2-cycle (you realistically need a 2 cycle of curves for CurveTrees), has to be replaced with something more complex, because their DJB ed25519 curve has a cofactor of 8 (yet again non prime order curve biting them on the ass, lol).

Another interesting tidbit is that they propose to use Liam Eagan's recent work https://eprint.iacr.org/2022/596  (posted almost contemporaneously with Curve Trees); I remember Andrew Poelstra pointing me at this work in '22 and I said to him "I don't understand this" and he responded "yeah it was difficult so I got Liam to come round to my house and explain it" 😁 .. so yeah i'm sure some people can follow the ideas there but I am alas not yet one of them :)

They've also done a review of the generalized bulletproofs construction that Kamp et al used in their CurveTrees implementation: https://github.com/cypherstack/generalized-bulletproofs

Also interesting is that they talk about acheiving a "forward secrecy" property here, which linkable ring signatures can't have, by design: if a future ECDL breaker is found, it can always see the trace of payments in prior Monero because the linking tag reveals the private key if you can crack ECDLP. I'm not sure how this works but I believe it's to do with the Liam Eagan research just mentioned.

Finally, the extremely esoteric and dense mathematical concepts aside, it's worth mention a 1000 ft view: this proposal ditches ring signatures (and somehow they get backwards compatibility for the historical chain, though I absolutely don't understand that yet), and goes to a full ZKP proving system (bulletproofs arithmetic circuits) for full anon set. I can't help wondering if this direction makes sense - if we look at Zcash, they do the same thing, but using bilinear pairings they can get far more performant proof, proof size and verification stats, I believe (but, curvetrees can be very efficient so I'm not 100% sure about the details here). Ring sigs, as I've observed elsewhere, even with the fanciest algorithms, never quite cut it at the verification step to be able to support huge anonymity sets. If you're going to ditch them, you may just as well go with a Zcash style design, no?

wait… what? 🫠

Hello fellow #plebs on #nostr 👋

Today i wanna share someting with you, because it had such a tremendous impact on my well-being, my health, my strength, my mind, my relationship and my soul.

I want to tell you about Zhan Zhuang, a ancient chinese form of exercice which could be translated as „stand like a tree“ 🌳.

Today marks the 💯th day of my daily exercice. Right after i get up, i drink a glas of water, take a spoon of honey and go outside to start training.

There are a handful of basic positions but the first one is the most basic, simple and important: you just stand, with your spine erect, your legs and feet, from your knees onward, reaching like roots into the ground below. Imagine that there is a string, coming from heaven, connected to the tip of your head above your ears. Hanging on this string you let your shoulders and arms come down and relax.

So you stand, as the connecting being between heaven and earth.

You start with 5 minutes daily, which you extend by another 5 after three weeks and so on till you reach 20 minutes in the first position. After that you start to integrate the second position. There are five basic positions. If you can hold them each for 20 minutes you start to do a full cycle of all five, for 5 minutes each.

Thats it. I hope you liked this short #introduction to #ZhanZhuang which after many years in search for a combination of #exercice and #meditation helped me build my inner strength and energy in a healthy way.

If i got you interested in this ancient form of exercice, make sure to check out these resources, which helped me on my way:

~ Awesome video introduction by master Lam Kam Chuen. Great for beginners!

https://www.youtube.com/playlist?list=PL5AC656794EE191C1

~ If you want to dig deeper, check out his book „Way of the Energy“, which will provide you with more details alongside beautiful hand drawings.

https://annas-archive.org/md5/f9a734d36c9955f458f950f6919246dc

Thanks for reading!

Bye

"[Denationalization of money is] the one way in which we may still hope to stop the continuous progress of all government toward totalitarianism which already appears to many acute observers as inevitable. But the time is short. What is now urgently required is not the construction of a new system but the prompt removal of all the legal obstacles which have for two thousand years blocked the way for an evolution which is bound to throw up beneficial results which we cannot foresee.“

— Friedrich August von #Hayek, The Argument Refined

Also meanwhile in the EU:

„EU Council Presidency wants to categorise encrypted messengers as dangerous“

note1848yresa5kx6ruddmrlvq6uc0rygcy03sp7p74v08zk3g8vsk2ns5pm0mq

Give them #strike and take their #privacy on the same day.

Well played #eu