Ken shirriff bitcoins

By Jeremy Wagstaff. Forum websites like Reddit and internet relay chatrooms have attracted hordes of users as the Mt. Gox debacle unfolded in recent weeks. But their crowdsourcing investigations have uncovered little in the way of real evidence about what happened. The collapse of Mt.



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WATCH RELATED VIDEO: Bitcoin: How Cryptocurrencies Work

Guy Tried To Mine Bitcoins On This 50-Year-Old Computer That Took NASA To Moon


The subtitle of the blog is "Computer history, restoring vintage computers, IC reverse engineering, and whatever" and it is full of fascinating articles, several of which have been featured here on HN. Thanks for the nice mention of my blog. I was wondering if anyone remembered my old bitcoin article It's a classic. You will be forever remembered for your timeless contributions to the collective consciousness!

The retro-computing stuff I see you guys doing on CuriousMarc's youtube channel blows my mind. I go back to it twice yearly. We do. There was a reference implementation of Ethereum in Python? NextHendrix 7 months ago parent prev next [—]. Ken's blog is great, as well as his work with CuriousMarc. Here's when he tried mining bitcoins by hand. That's basically just a SHA hashing on pen and paper, doesn't have much to do with how bitcoin works. Saig6 7 months ago root parent prev next [—].

Same guy, Ken Shirriff. I'm amazed that he has time for this kind of hobby work. For others: Andrej Karpathy is the director of artificial intelligence and Autopilot Vision at Tesla. He was doing this kind of hobby work well before. I learnt solving Rubik's cube from his page[0]. Woah, he's him? Same here! I had no idea!!! That's amazing. Same - recognised the domain instantly!

Used it to teach my son as well. What a pleasant surprise! Oh wow, me too. I think I still have my printouts of the PLL algorithms somewhere… Cool to learn this is the same guy. Because a lazy person will find an easy way to do it. Is it necessary for me to drink my own urine? No, but I do it anyway because it's sterile and I like the taste.

I am Groot -- Groot. A lot of busy, smart people have seemingly random side-projects. From this point of view intelligence and memory may be just like muscle: the more you use train it, the more is grows performs well. See also Peter Norvig. Probably helps his boss is the "tecnoking" and cfo is the "master of coin".

Agreed though - impressive he has that kind of sidebar time or is so capable he doesn't need that much time to figure it out. This stuff isn't that hard to figure out, given the number of specifications and tutorials already out there.

What's impressive is the fact that he thought of a reasonably sized task, and presumably executed it efficiently and completely without getting stuck or distracted. I spent quite some time researching this a few years ago.

Then I finally programmed and generated my own fully working address. It's quite a satisfying journey. But I have to say, Python makes this somewhat less painful than it is in JavaScript yes, I tried that too He started tweeting about this like months ago. Everything I learned about deep neural networks, enough to apply it in a live product, was essentially all his notes, videos and exercises.

Thanks Andrej and keep doing cool stuff! I know right? I had to do a double take when I saw the link, and then had to click it to confirm it was that Karpathy. FSD rollout has been delayed many times. He's underperforming. This is a very cynical way of looking at development progress.

Did the iPhone team underperform by shipping in instead of ? He's almost certainly a x engineer. Or Elon is over-performing. If you are really curious, all the secrets are out there.

Finding one with a balance is the hard part. I was wondering if monitoring those starter addresses could be lucrative They've transacted quite a lot. Thanks, I was wondering the same but too lazy to figure out the addresses! Implementing things from scratch is probably the ultimate test of thorough understanding.

On another note I am amused that Mr. Karphathys name describes exactly what he is doing in his day job. An excellent example of nominative determinism! I don't get it. What does the word "Karpathy" mean or sound like? I was trying to think of a connection between "Karpathy" and Bitcoin. Car pathing, as in getting cars to drive along a path.

Sometimes implementing things from scratch is the ultimate proof of thorough misunderstanding. That's very true, I don't know why you're getting downvoted. Cantinflas 7 months ago prev next [—]. How is a curve going to have backdoors on it? Or he means a specific implementation?

Or is this a joke? I'm confused. They have some unusual hand-selected constants that nobody quite understands exactly why they were selected. It's all quite public. It goes on to quote one of the NSA contractors who admitted that instead of being randomly chosen, "Q is in essence the public key for some random private key. That's deeply suspicious.

Cantinflas 7 months ago root parent prev next [—]. Thanks to the other answers too. Amazing stuff! There's been a history of mathematical information used in cryptography produced by the NSA, for which it's later revealed, they had pre-developed an attack.

Example: the s-boxes of DES. While keeping DES to 56 bits, to keep the attack within reach. At the time of writing this is 0. Can someone explain how this was executed? Though, of course, there have been instances of both You have the secret key, just sign away the txouts. Fees are dictated by the user and the time they have for the transaction to take place.

The fee could have been much lower. I think we are well past the point of debating if bitcoin layer one will be used for day to day transactions however. A custodial service or lighting will have to be used for that. Additionally most people treat bitcoin closer to gold than a dollar currently. Everything is in pure python with no dependencies, only std lib.

One little nitpick: the checksum error probability should be more like 9 nines. Two days in a row I see this Karpathy name on the front page of HN on two totally unrelated subjects. It almost feels like this is simulated world and something is wrong. He's seni-famous even before working at Tesla. Bitcoin is a living, breathing, developing code base that is moving forward with new features to continue to scale



Learn how to mine Bitcoin with just a pencil and paper

However, the creation of ad-hoc scripts to lock and unlock transactions allows for also generating non-standard transactions, which can be nevertheless broadcast and mined as well. In this work, we explore the Bitcoin block-chain with the purpose to analyze and classify standard and non-standard transactions, understanding how much the standard behavior is respected. Money transactions do not require a third-party intermediary, with no traditional financial-institution involved in transactions. Therefore, the Bitcoin network is completely decentralized, with all the transaction components performed by the users of the system.

According to the basic algorithm of Bitcoin, Bitcoin generates 1 block every 10 minutes, Technically, this is feasible, although Ken Shirriff concludes.

About bitcoin mining, things you don’t know

Ken Shirriff is a hardware hacker who also has a penchant for restoring old computers, including the Xerox Alto , which had a huge influence on Steve Jobs and the Macintosh computer. Doing something you love and making money from it is the ultimate pursuit, so after rebuilding and restoring an authentic AGC, Shirriff reprogrammed it to mine bitcoin—a stark departure from its wrangling of data from hundreds of sensors and rocket thrusters, as NASA originally designed it to do. These l'il guys will fix your internet Designed to work in concert to bring you a seamless network experience across your whole home, up to 4, square feet. Instead of relying on a single main computer controlled by one organization, the bitcoin system uses virtual ledgers called blocks to store information about transactions and ownership of the virtual currency on thousands of computers around the world. The process involves generating trillions of random numerical sequences until the correct one is found, which results in a block being successfully mined. The more computers you can dedicate to the task of generating those random hashes, the better your odds are of hitting it rich. Some bitcoin miners use entire data centers to mine the cryptocurrency. The Apollo guidance computer, by comparison, took a little over 10 seconds to generate just a single hash.


Why bitcoin needs a new symbol

ken shirriff bitcoins

By Jeremy Wagstaff. Forum websites like Reddit and internet relay chatrooms have attracted hordes of users as the Mt. Gox debacle unfolded in recent weeks. But their crowdsourcing investigations have uncovered little in the way of real evidence about what happened. The collapse of Mt.

Bearcoin was a cryptocurrency experiment created during weekend of Hack at Brown

Here’s How Developers Are Recycling Old Electronics into Bitcoin Mining Rigs

Blockchain is the technology behind Bitcoin. Di Giorgio, there are high hopes for blockchain technology. It even has the potential to make banks redundant. Blockchain has solved a fundamental problem of the digital finance world — the problem of double-spending. Anything digital can be copied and multiplied: photos, songs and — in theory — money. Banks now take measures to prevent us from duplicating money in this way.


Create Bitcoin Alternative

Please create an account to participate in the Slashdot moderation system. Sticking it to the banks and overthrowing government control of the world's money supply is only a bonus. I don't give a shit about bitcoin, but I'll click on anything involving restored Apollo era hardware. Now that we have the world's only working AGC, I decided to write some code for it. Trying to mine Bitcoin on this s computer seemed both pointless and anachronistic, so I had to give it a shot. Something pointless and anachronistic on Apollo hardware is pretty much the coolest thing I can imagine. Since Bitcoin uses a double-hash, this results in a hash rate of Yes, but you can optimize this a little bit.

Continued from the previous article, continue to study Ken Shirriff's Bitcoins the hard The transaction information in Bitcoin is called tx on the wiki.

Interview: How exactly does blockchain work?

Between predictions of a difficulty drop and the recent legal maelstrom surrounding Butterfly Labs, you might think that it was all bad news in the mining community. However, those who have been active in this market segment for long enough know it would take more these events to stop miners from hashing. The decision will enable shipments to resume and, according to the FTC, set the stage for long-term action against the Missouri-based company. CoinDesk spoke to FTC lawyer Leah Frazier, who confirmed that a court-appointed receiver remains in control of the company.


Bitcoins are chains of digital signatures

RELATED VIDEO: Mining Bitcoin with pencil and paper

The subtitle of the blog is "Computer history, restoring vintage computers, IC reverse engineering, and whatever" and it is full of fascinating articles, several of which have been featured here on HN. Thanks for the nice mention of my blog. I was wondering if anyone remembered my old bitcoin article It's a classic. You will be forever remembered for your timeless contributions to the collective consciousness!

A computer engineer and dedicated blogger, Ken Shirriff, went a little nostalgic in his attempts to mine a Bitcoin block, indicates his use of the good old IBM mainframe from the s. More than an attempt, it was an experiment to study the feasibility of Bitcoin mining operations on vintage machines.

Recently, inspired by Ken Shirriff's and Bryce Neal's low level looks at the Bitcoin protocol, I set about constructing Bitcoin's much talked about multisignature transactions from scratch to understand their capabilities and limitations. The code to do it all in Go is available as go-bitcoin-multsig on GitHub and I'd like to go through how all of this works at the Bitcoin protocol level. We'll also step through creating and spending a multisig transaction to make it all clearer. In many ways, this is a follow up to Ken's amazing explanation of the Bitcoin protocol and constructing a Pay-to-PubKeyHash P2PKH transaction, so I won't cover things covered there in any great detail. Please check out his post out first if you're completely new to the Bitcoin protocol. I'll be using go-bitcoin-multisig to generate keys and transactions along the way, explaining each step.

According to the basic algorithm of Bitcoin, Bitcoin generates 1 block every 10 minutes, and there are N bitcoins in each block as compensation the number of N is explained below. This block contains all the last 10 minutes. Bitcoin transaction information.


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