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1  Bitcoin / Development & Technical Discussion / Re: The Quantum Threat to Bitcoin: Implications for Miners, Nodes, and Wallets on: September 26, 2023, 09:14:35 PM
You should read previous page to understand, but it's technical, sha256 proven to be strong enough at least so far, many experts work on breaking it, if one of them finds a weakness, the whole world will know about it and will have time to use a stronger hash function.

If a weakness is found in EC, it should be revealed for everyone, then if everyone wants to continue using crypto, they will have to use another type of curve, a different and stronger one. If it happens gradually bitcoin can survive, if it gets exploited in mass and suddenly, it would be difficult to restore things back to normal. These are speculations, not expert's opinions.


my question is less about how likely it is or if it would be fast. It's more about a possbile transition.
Lets say it get broken some distant time in the future (sha256 and EC), but slowly and the public is aware of it:
Now people would start migrating to stronger encryption all over the internet and also bitcoin would introduce an update with a more secure algorithm.
Now all coins on old addresses would possibly be in danger, because over time people could get access to it. At first it would take really long to do but it will get faster.

How could a possible transition look like? Or would it be the end of bitcoin.
Normally if you want your coins safe you would send them to a new wallet that has its sk/pk generated by the new algorithm. But everybody would need to do that and that would flood the mempool if every living owner of btc would suddenly try to move his coins.

Quote
About wallet tracking, it is unrelated to this topic, but if you don't want anyone to connect your wallets to  certain transactions, use a mixer.

right now you can have multiple addresses on one wallet without any connection between them. My question was if breaking sha256 would make it possible to connect them.
2  Bitcoin / Development & Technical Discussion / Re: The Quantum Threat to Bitcoin: Implications for Miners, Nodes, and Wallets on: September 26, 2023, 05:35:49 PM
...
Sha256 hash function is used in bitcoin signatures/transactions, mining and generating addresses, it has nothing to do with private keys and elliptic curve. They are different. Have you ever seen a quantum computer? It's like some sort of alien spaceship engine, I don't think those who can build one enough powerful would use it to target crypto.

If hash functions are compromised there is a chance to survive for  bitcoin, but with EC compromised, the whole concept of public key cryptography is doomed. So there will be no transferring of anything.😑

thank you for the explanation.
So an update to a new secure hash algorithm would be a problem from a mempool point of view, but a new EC would be?
Would comprimising sha256 be a privacy concern if it is used for generating addresses? Would it mean someone could connect all addresses from one wallet?

Computers used to fill an entire room, now better computers are in everyones pocket, so we never know how accessible quantum computing could get Smiley
3  Bitcoin / Development & Technical Discussion / Re: The Quantum Threat to Bitcoin: Implications for Miners, Nodes, and Wallets on: September 26, 2023, 11:47:02 AM
lets say quantum computing comes slowly and a new algorithm is found that is secure against it. Then bitcoin would most likely change from sha256 to it. So all new wallets/addresses are secure by the new algorithm. What happens with the old ones? If sha256 is broken, you could get the private key from the public Key. Or am i wrong with that? So everyone would need to transfer their funds from their old addresses to new ones. Wouldnt that completly blow up the mempool and with that the transaction prices? Most people would lose a lot of their value just to transact to a safer address or they would leave their funds in the open for anyone with the algorithm to get them.
4  Local / Anfänger und Hilfe / Re: Sicherung der Seedphrase mit Unterlegscheiben on: April 18, 2023, 02:31:33 PM
super Post, das Thema interessiert mich auch schon länger.

Kleiner Punkt zur Vorrichtung (3D Druck) zum Stanzen:

mit 30€ bist du weit über dem was ich dafür ansetzen würde. Materialkosten und Strom bewegen sich geschätzt unter 5€. Die meisten Leute kennen bestimmt jemanden der einen 3D Drucker besitzt und das fix druckt. Wer sich nicht so glücklich schätzen kann, der kann auf so Seiten wie z.B. https://world.prusa3d.com/de nach jemanden in der Nähe suchen, der das druckt. Oder eben auf dem nächsten Bitcoin Meeting oder in einer Telegram gruppe fragen. Mehr als 10€ ist in meinen Augen aber zu viel.
5  Economy / Collectibles / Re: [WTS] Bitcoin art on cavas and digital on: April 09, 2023, 08:34:34 AM
thank you haloxon Smiley
6  Economy / Collectibles / [WTS] Bitcoin art on canvas and digital on: April 08, 2023, 06:19:50 PM
Hey

in the last year i started painting some bitcoin related art with acryl on canvas. It started with a painting i made for a friend but now there are a few more.
I wanted to see if there are some people here that may like them and would like to buy them for btc.

I am willing to sell both, the physical and digital versions

Here are some of my paintings:

Matrix orange Pill (50x20cm):


Momo (Michael Ende) with ECB (50x50cm):


follow the white rabbit (want to keep the original):


Fightclub (18x24cm):


Satoshi Nakamoto whale (original sold already)


Cold storage (30x30cm):



original (physical) prices depend on the painting. Mainly for me how much time i spend painting them. Just write me a message and we will find a fair price.
The digital versions would obviously be much cheaper.
You can then choose the medium to get the prints yourself (fineart paper, on metall, acrylic glas, canvas)

A Guy i sold a digital version, made those nice prints with them and he was so nice to give me the pictures of the prints:

acrylglas:


40x40cm print:


more detailed photo:


greetings
blu3baer


i also made a small twitter and instagram account in case anyone is interested. I post when i finish a new painting:
https://twitter.com/blu3baer
https://www.instagram.com/blu3baer/
7  Local / Biete / Biete Bitcoinkunst (acryl und digital) gegen Bitcoin on: March 29, 2023, 03:26:40 PM
Guten Tag,

ich habe im letzten Jahr angefangen einige Acrylbilder mit zum Thema Bitcoin zu malen. Ursprünglich hat es angefangen, da ein Kumpel eins haben wollte.
Jetzt ist es doch eine kleine Sammlung geworden und ich würde ein paar davon zum Verkauf gegen Bitcoin anbieten.
Ein Freund hat mir gesagt, dass hier auf der Seite eventuell ein paar Leute Spaß an den Bildern hätten. Deshalb habe ich mir jetzt auch hier einen Account zugelegt.

Hier ein paar meiner Bilder:

Satoshi Nakamoto Wal (schriftzug im wal)


Momo von Michael Ende mit EZB im Hintergrund:


Weißer Hase (follow the white rabbit) aus Alice im Wunderland:


Matrix orange Pill:


Fightclub:


Coldstorage:



Grundsätzlich gibt es dabei zwei Optionen:

1. Das Original kaufen (wenn noch vorhanden), da würde ich den Preis per PN ausmachen. Je nach Bild denke ich im Rahmen 120-800 € (in BTC), was größtenteils einfach den enormen Arbeitsaufwand der teilweise in den Bildern steckt wieder spiegeln soll.

oder

2. Einen Druck kaufen. Das geht auch ganz einfach Digital und dann selbst drucken lassen und direkt nach Hause liefern lassen.
Digital würde ich die einzelnen Bilder für 0,001BTC verkaufen (ca. 20-30€ je nach Kurs grade).
Oder ich lasse die Prints (Leinwand, Fineart-papier, acrylglas) machen und schicke sie euch zu. Für einen entsprechenden Aufpreis + Versand

Beispiele für Prints, die jemand mit meiner digitalen Version gemacht hat:

Als Acrylglasblock:


40x40cm print:


nähere Aufnahme (Die Struktur kommt von seiner Leinwand):


grüße
Blaubär

auf Twitter/Instagram habe ich mir jeweils einen kleinen Account gemacht, dort poste ich meistens die Bilder wenn ich wieder eins gemalt habe:
https://twitter.com/blu3baer
https://www.instagram.com/blu3baer/
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