Analog Bitcoin Mining with Pen, Paper and Math

bitcoins

Der Krypto-Algorithmus SHA-256 zur Berechnung der benötigten Hash-Werte ist anscheinend simpel genug, um den mit Bleistift auf Papier auszurechnen. Analog schafft man einen kompletten Hash in grob 17 Minuten, das sind rund 0,67 Hashes pro Tag. Aber: Nur einer von 100 Trillionen Hashes mined einen Bitcoin.

[Bitcoin-Mining] consists of repeatedly performing a cryptographic operation called hashing until an extremely rare hash value is found – one that begins with around 17 zeros. Only one out of 1.4×1020 hashes will be successful. […] One round of the algorithm takes 16 minutes, 45 seconds which works out to a hash rate of 0.67 hashes per day.

Man braucht also rund 200 Trillionen Tage, um einen Bitcoin analog zu errechnen, das sind rund 547 Billiarden Jahre. Zu diesem Zeitpunkt ist das Universum schon lange in seiner Degenerativen Phase angekommen und auf der Timeline of the very far Future passiert grade das hier:

Over time, objects in a galaxy exchange kinetic energy in a process called dynamical relaxation, making their velocity distribution approach the Maxwell–Boltzmann distribution. Dynamical relaxation can proceed either by close encounters of two stars or by less violent but more frequent distant encounters. In the case of a close encounter, two brown dwarfs or stellar remnants will pass close to each other. When this happens, the trajectories of the objects involved in the close encounter change slightly. After a large number of encounters, lighter objects tend to gain kinetic energy while the heavier objects lose it.

Because of dynamical relaxation, some objects will gain enough energy to reach galactic escape velocity and depart the galaxy, leaving behind a smaller, denser galaxy. Since encounters are more frequent in the denser galaxy, the process then accelerates. The end result is that most objects (90% to 99%) are ejected from the galaxy, leaving a small fraction (maybe 1% to 10%) which fall into the central supermassive black hole.

Derzeit hat 1 Bitcoin einen Wert von rund 300 Euro. Wenn also Herr Math-Nerd Ken Shirriff aus dem Video oben aus seinen ersten Bitcoin zusammen hat, kann er uns davon eine dicke Runde ausgeben, während wir alle zusammen den Zusammensturz der Welt im Restaurant am Ende des Universums betrachten und für eine anständtige Anschaffung auf Analog-Bitcoin-Basis braucht man wahrscheinlich drölfhundert Parallelwelten. I love this.

The SHA-256 algorithm is surprisingly simple, easy enough to do by hand. (The elliptic curve algorithm for signing Bitcoin transactions would be very painful to do by hand since it has lots of multiplication of 32-byte integers.) Doing one round of SHA-256 by hand took me 16 minutes, 45 seconds. At this rate, hashing a full Bitcoin block (128 rounds) would take 1.49 days, for a hash rate of 0.67 hashes per day (although I would probably get faster with practice). In comparison, current Bitcoin mining hardware does several terahashes per second, about a quintillion times faster than my manual hashing. Needless to say, manual Bitcoin mining is not at all practical.

A Reddit reader asked about my energy consumption. There’s not much physical exertion, so assuming a resting metabolic rate of 1500kcal/day, manual hashing works out to almost 10 megajoules/hash. A typical energy consumption for mining hardware is 1000 megahashes/joule. So I’m less energy efficient by a factor of 10^16, or 10 quadrillion. The next question is the energy cost. A cheap source of food energy is donuts at $0.23 for 200 kcalories. Electricity here is $0.15/kilowatt-hour, which is cheaper by a factor of 6.7 – closer than I expected. Thus my energy cost per hash is about 67 quadrillion times that of mining hardware. It’s clear I’m not going to make my fortune off manual mining, and I haven’t even included the cost of all the paper and pencils I’ll need.

Mining Bitcoin with pencil and paper: 0.67 hashes per day (via Algopop)

10000 Pigeons analprobed by Chinese Security:

Die chinesische Regierung war besorgt wegen Terror-Tauben und hat alle Vögel-Teilnehmer an der Zeremonie für Chinas Nationalfeiertag rektal auf „dangerous Material“ untersuchen lassen. You can’t make this shit up: „About 10,000 pigeons released in a ceremony for China’s National Day underwent unusual scrutiny, each having its feathers and anus checked for dangerous materials, state-run media has said, reflecting government concerns over possible attacks.“ (via Boing Boing)

Kutimans Thru You Too Mashup-Album from Youtube-Videos

Kutiman hat sein Thru You Too-Mashup-Album online gestellt und gleichzeitig neue Musikvideos zu allen Tracks und den Intro-Clip zu Introducing Thru You Too oben in seinen YT-Channel geladen. Ich hab’s mir noch nicht genau angehört, dürfte aber sehr sensationell sein. Ich hab’s genau angehört und es ist sensationell. (via Martin)

Thru You Too is a music album made out of unrelated YouTube videos mixed together. No additional sounds were recorded and none of the players knew they are participating. This is the follow up to my ThruYou project which was released in 2009.

I would like to thank all the musicians who are part of this project and to all of you out there for sharing your knowledge and talent on the internet.

— Kutiman

Nach dem Klick alle Clips zum Album: Gib mir den Rest, Baby…

Psychedelic Honey:

Wieder was gelernt: Es gibt halluzinogenen „Mad Honey“ aus der Türkei und ich hätte den jetzt gerne hier. WANT!

madhoneyThe dark, reddish, “mad honey,” known as deli bal in Turkey, contains an ingredient from rhododendron nectar called grayanotoxin — a natural neurotoxin that, even in small quantities, brings on light-headedness and sometimes, hallucinations. In the 1700s, the Black Sea region traded this potent produce with Europe, where the honey was infused with drinks to give boozers a greater high than alcohol could deliver.

When over-imbibed, however, the honey can cause low blood pressure and irregularities in the heartbeat that bring on nausea, numbness, blurred vision, fainting, potent hallucinations, seizures, and even death, in rare cases. Nowadays, cases of mad honey poisoning crop up every few years—oftentimes in travelers who have visited Turkey.

Modern Farmer: The Strange History of ‘Mad Honey’

Guardian: The buzz about ‘mad honey’, hot honey and mead

Wu-Tang Clan releases Album on hexagonal Boombox

wutang

Wu-Tang veröffentlichen ihr 20th Anniversary-Album A Better Tomorrow auf ‘ner Sechseck-Boombox, vorbestellen kann man das Teil hier für 80 Dollar mit „embedded“ Songs und funktionierender Bluetooth-Box. Nice!

Teaming with Boombotix, the album will be released only as a limited-edition special version on a portable speaker, the Wu-edition Boombot Rex. Those who have purchased the album on this platform can then play the music files it contains through any Bluetooth device.

Wu-Tang Clan to release new album on boombox speaker

Umbrella Revolution in Abandoned Hong Kong

Ich lese mich grade in die Hong Kong-Proteste ein, die Demonstranten fordern Wahlen zur Bestimmung des nächsten Bürgermeisters ihrer Stadt im Jahr 2017. Nachts verwandeln sie den Finanzdistrikt in ein Lichtermeer aus Handys und Regenschirmen, tagsüber sind die Hauptstraßen Hong Kongs völlig menschenleer (Bild oben via @JeromeTaylor), weil die Demonstranten die Straßen abgesperrt haben.

Peking hält sich dort noch zurück, wohl auch wegen des heutigen chinesischen Nationalfeiertags, auf dem Festland werden aber bereits Sympathisanten festgenommen und heute erschien in der staatlichen Peoples Daily-Zeitung folgende Ansage:

Hong Kongers who continue to participate in the protests should expect dire consequences, an editorial in the People’s Daily newspaper warned today.

Some activists and analysts, including a former Tiananmen student leader, say the piece bears a marked similarity to a notorious editorial that ran the People’s Daily more than 25 years ago. That piece was later blamed for leading to the brutal crackdown on demonstrations, which killed hundreds or thousands, depending on estimates.

Derweil erfindet die Demokratiebewegung in Hong Kong und in China neue Memes gegen die Zensur des Regenschirm-Aufstands: Chinese Web Censors Struggle With Hong Kong Protest.

They have been posting pro-democracy remarks on nonpolitical websites and uploading selfies of their shaved heads to express solidarity with the protesters. On Tuesday, some social media users shared stock images of President Xi Jinping carrying an umbrella, a not-so-subtle nod to that essential protester accessory for staving off sun, rain and pepper spray. Other users simply changed their profile photo to that of an umbrella.

Charlie Smith, co-founder of Greatfire.org, a group that tracks Internet censorship in China, said authorities were not likely to relax. “They are going to be on top of this situation 24/7.”

Designer bauen jede Menge Visuals: Umbrella Revolution: Occupy HK protests inspire internet memes.

10653627_10152751826795281_6163355507567101534_n

Images are being posted on Twitter and Instagram using the hashtag #umbrellarevolution and Kacey Wong, an assistant professor at Hong Kong Polytechnic University, has also set up an Umbrella Revolution logo design competition on Facebook and is posting submissions on his Facebook page.

Und am Ende vom Protest räumen sie auch immer auf:

Ich wünsch’ den Leuten dort und Joshua Wong Chi-fung viel Glück und drücke alle Daumen, dass das alles gut geht.

Nach dem Klick die Links und Kram, den ich heute dazu gelesen habe: Gib mir den Rest, Baby…

Eyeball Licking Healer Granny:

eyes„A Bosnian pensioner claims she can cure eye problems – by licking eyeballs with her golden tongue. For over 40 years, granny Hava Cebic, 77, has been helping friends and neighbours in her small village of Crnjevo, in northern Bosnia and Herzegovina, by licking eyeballs. Later, as her fame spread, locals from other villages have travelled to see her.“ (via Arbroath)

Hackers busted for Apache Helicopter Training Software

hubschrabbschrabbVier Kids haben sich in die Server von Microsoft, Valve und Epic gehackt und jede Menge Pre-Releases runtergeladen, und dann haben sie einen Army Heli-Simulator von den Zombie Studios geklaut, „as well as other intellectual property“, haben sich leider dabei erwischen lassen und stehen vor Gericht. Ich würde die ja direkt einstellen, aber mich fragt ja keiner.

The four, aged between 18 and 28, are alleged to have stolen Xbox technology, Apache helicopter training software and pre-release copies of games such as Call of Duty: Modern Warfare 3, according to an indictment dating from April that was unsealed on Tuesday. […] The hackers are alleged to have accessed the computer system of Zombie Studios, which allowed them to access a Apache helicopter training simulation program that the company had developed for the US army.

Other targets of the alleged hacks included Microsoft, and game companies Epic Games and Valve, the DoJ announced. It said the US has seized $620,000 in proceeds “related to the charged conduct”.

Guardian: Hackers charged with stealing over $100m in US army and Xbox technology (Bild via Shutterstock)

Geek Nerd-Shirts gewinnen gegen Trademark-Troll:

Vor rund einem Jahr wurde GetDigital für die Nutzung der Wortkombination „Geek Nerd“ abgemahnt von einer Firma namens Trade Buzzer UG, die neben „Geek Nerd“ auch noch unter anderem „Sheldon Cooper“, „Walter White“ und „Gamer“ als Markenzeichen eintragen ließen. Get Digital hat nun vor Gericht in Berufung gewonnen und die Trademark-Trolle von Trade Buzzer und ihr Anwalt haben ganz winzig kleine primäre Geschlechtsmerkmale. Bastards.

doom

Lego Doom

Doom aus Lego von Ochre Jelly, mehr Bilder hier auf Flickr. (via Superlevel)

Brillant Lighting-Ad with Jeff Goldblum

Brillant Lighting-Ad with Jeff Goldblum

Scheiß auf den Stromanbieter, aber das Commercial von Tim Heidecker und Eric Wareheim (Tim and Eric Awesome Show) ist großartig! (via Polygon)

Twitter-Bot-Conversations in glitched Images

pxelbots

Glitchbots sind Twitter-Bots, die auf einen Tweet mit angehängtem Bild mit einer geglitchten Version des Bildes antworten. Und wenn nun der Autor eines Glitchbots von dessen Account aus einen anderen Glitchbot mit einem Bild antweetet, ergibt das eine endlose Reihe geglitchter und meta-geglitchter Bilder ad infinitum. Hier ein Beispiel einer Glitchbot-Konversation zwischen @pixelsorter und @a_quilt_bot, hier zwischen @pixelsorter und @badpng. Aus einem Blogpost von Pixelsorter-Macher Way Spurr-Chen:

I decided to tweet an image at both @badpng and @pixelsorter. I’ve tried this before – usually what happens is that @badpng takes the image, distorts it, and then passes it off to @pixelsorter, who then returns the image innocuously. […] @badpng tweeted back at me and @pixelsorter directly and then @pixelsorter responded. And so did @badpng. And it went on. And on. And on…

The Eternal Robot Love Story of @badpng and @pixelsorter (via New Aesthetics)

Vorher auf Nerdcore:
Chatbot2Chatbot-Konversation wird philosophisch
Chatbots discuss Chomsky & Foucault
Chatbots talks to Chatbot, becomes self-aware as a unicorn
Interview with the Chatbot2Chatbot-Creators
Siri meets Eliza
Chatbot Conversations

Minecraft 2 in Microsoft Excel

Minecraft 2 in Microsoft Excel

Seth Bling hat Minecraft in Excel nachgebaut. So oder so ähnlich dürfte das Game demnächst aussehen, wenn Microsoft mit ihren 2,5 Millarden Dollar-Griffeln damit fertig sind. Vorher auf Nerdcore: Turing Machine in Excel RPG in an Excel-File

Analog ASCII-Portraits of Writers

Álvaro Franca tippt ASCII-Portraits von Bukowski, Salinger oder Kerouac auf einer Schreibmaschine, hier noch ein Timelapse-Video vom Portrait Jack Kerouacs:

P.T. Andersons Inherent Vice – Trailer

IV POSTER

Neuer Film von Paul Thomas Anderson (There will be blood, Magnolia, The Master) mit grandioser Cast (Joaquin Phoenix, Josh Brolin, Owen Wilson, Katherine Waterston, Reese Witherspoon, Benicio Del Toro, Martin Short, Jena Malone, Joanna Newsom) und einer 60s-Detective-Pulp-Story voller Psychedelics von Thomas Pynchon – I’m sold.

When private eye Doc Sportello’s ex-old lady suddenly out of nowhere shows up with a story about her current billionaire land developer boyfriend whom she just happens to be in love with, and a plot by his wife and her boyfriend to kidnap that billionaire and throw him in a loony bin… well, easy for her to say. It’s the tail end of the psychedelic `60s and paranoia is running the day and Doc knows that “love” is another of those words going around at the moment, like “trip” or “groovy,” that’s being way too overused—except this one usually leads to trouble.

With a cast of characters that includes surfers, hustlers, dopers and rockers, a murderous loan shark, LAPD Detectives, a tenor sax player working undercover, and a mysterious entity known as the Golden Fang, which may only be a tax dodge set up by some dentists… Part surf noir, part psychedelic romp—all Thomas Pynchon.