"bitcoin" entries

Four short links: 21 March 2014

Four short links: 21 March 2014

PHP++, Planning, BitCoin, and Concurrency

  1. Hack — PHP with types, generics, collections, lambdas. From Facebook.
  2. Solve Hard Things EarlyBuild great habits around communication and decision-making when everyone still knows each other well.
  3. Marginally Useful (Paul Ford) — The last two decades have suggested a post-scarcity economy, where infinite copies of attractive digital things have a price approaching $0. Maybe that was merely a passing moment that we will look back upon with wonder once limited coins enforce scarcity—once the owner of a piece of digital art can look upon it with satisfaction and know with total, cryptographic certainty that because he paid for it, it belongs to him and no one else.
  4. Go Pipelines and Cancellation — Go’s fascinating me, as an example of a language designed for concurrency and syntactic familiarity.
Comment: 1
Four short links: 13 March 2014

Four short links: 13 March 2014

Parallel Programming, Malignant Computation, Politicised GDS, and Data Stream Toolkit

  1. Is Parallel Programming Hard? And, If So, What Can You Do About It? — book by Paul E. McKenney, on single-machine multi-CPU parallel programming.
  2. Malignant ComputationThe bitcoin mining network would work just as well if it had far less computation devoted to it. Bitcoins would be mined at exactly the same rate if 1/2 or 1/4 of the computational resources were devoted. This means that bitcoin has incentivized a tremendous amount of computational busy work.
  3. GDS Becomes Political (Computer Weekly) — She [Opposition MP] said that digital should not be about imposing a way of working on the public sector – Labour is not fond of the “digital by default” mantra – but about supporting public service delivery. […] “When this government decided upon the digitalisation of this [online job search] service they apparently did not take into account those with poor literacy skills, mental health issues or learning difficulties – who, as most people would have predicted, make up a higher-than-average proportion of the unemployed.”
  4. streamtools (Github) — a graphical toolkit for dealing with streams of data. Streamtools makes it easy to explore, analyse, modify and learn from streams of data. (via OpenNews)
Comment

Failure is a fundamental component of business evolution

The MtGox bitcoin exchange failure illustrates exactly how capitalism should work.

This post originally appeared on Andreas Antonopoulos’ personal biographical site; it is republished here with permission.

In the free market, failure is always an option. The United States has one of the world’s most vibrant entrepreneurial cultures, where millions of people start small businesses, create new products and invent new technology. Part of the startup culture is the idea of failing fast, failing cheap and failing toward success by learning the lessons taught by failure. Cultures that punish even minor failure in business with shame, exclusion and stigma are far less likely to foster entrepreneurs because they prevent experimentation by making it too risky.

Recently, the US has been infected by the “failure is not an option” mantra, a toxic hubristic fallacy, disguised as a truism, which promotes the idea that risk can be removed from life; that 100% security and 100% control are possible, even desirable. Those who attempt to remove the possibility of failure, to de-risk financial systems, end up creating the probability of spectacular failure. By removing the option to fail cheap and fail fast, they instead concentrate risk and ensure we will fail hard, fail expensively, and fail across the board.

Read more…

Comment: 1
Four short links: 7 March 2014

Four short links: 7 March 2014

Distributed Javascript, Inclusion, Geek's Shenzhen Tourguide, Bitcautionary Tales

  1. Coalescecommunication framework for distributed JavaScript. Looking for important unsolved problems in computer science? Reusable tools for distributed anything.
  2. Where Do All The Women Go?Inclusion of at least one woman among the conveners increased the proportion of female speakers by 72% compared with those convened by men alone.
  3. The Ultimate Electronics Hobbyists Guide to Shenzhen — by OSCON legend and Kiwi Foo alum, Jon Oxer.
  4. Bitcoin’s Uncomfortable Similarity to Some Shady Episodes in Financial History (Casey Research) — Bitcoin itself need serious work if it is to find a place in that movement long term. It lacks community governance, certification, accountability, regulatory tension, and insurance—all of which are necessary for a currency to be successful in the long run. (via Jim Stogdill)
Comment
Four short links: 4 March 2014

Four short links: 4 March 2014

It's Complicated, Solid World, Bitcoin Redux, and CS Papers

  1. It’s Complicated — Danah Boyd’s new book on teens use of the online world is available for PDF download (but buy a copy anyway!).
  2. Building a Solid World — O’Reilly research paper about the “software-enhanced networked physical world”. Gonna be mighty interesting in a world where our stuff knows more and is better connected than its owners.
  3. What Did Not Happen at Mt Gox — interesting analysis of some of the popular theories. Overall, Bitcoin has been an ongoing massive online course on economics and distributed systems for the libertarian masses. It’s ironic that Mt. Gox turned into a chapter on fractional reserve banking.
  4. Papers We Love (Github) — a collection of papers from the computer science community to read and discuss.
Comment
Four short links: 3 March 2014

Four short links: 3 March 2014

Vanishing Money, Car Hackery, Data Literacy Course, and Cheaper CI

  1. The Programming Error That Cost Mt Gox 2609 Bitcoins — in the unforgiving world of crypto-currency, it’s easy to miscode and vanish your money.
  2. Ford Invites Open-Source Community to Tinker AwayOne example: Nelson has re-tasked the motor from a Microsoft Xbox 360 game controller to create an OpenXC shift knob that vibrates to signal gear shifts in a standard-transmission Mustang. The 3D-printed prototype shift knob uses Ford’s OpenXC research platform to link devices to the car via Bluetooth, and shares vehicle data from the on-board diagnostics port. Nelson has tested his prototype in a Ford Mustang Shelby GT500 that vibrates at the optimal time to shift.
  3. Making Sense of Data — Google online course on data literacy.
  4. Cost-Efficient Continuous Integration at Mozilla — CI on a big project can imply hundreds if not thousands of VMs on Amazon spinning up to handle compiles and tests. This blog post talks about Mozilla’s efforts to reduce its CI-induced spend without reducing the effectiveness of its CI practices.
Comment
Four short links: 25 February 2014

Four short links: 25 February 2014

MtGox Go Boom, Flappy Bird, Air Hockey Hack, and Robo Lab

  1. Bitcoin Markets Down — value of bitcoins plunges as market uncertain after largest bitcoin exchange goes insolvent after losing over 750k bitcoins because they didn’t update their software after a flaw was discovered in the signing of transactions.
  2. Flappy Bird for the Commodore 64 — the 1980s games platform meets the 2014 game. cf the machine learning hack where the flappy bird learns to play the game successfully.
  3. Air Hockey Robot — awesome hack.
  4. Run 30 Lab Tests on Only One Drop of Blood — automated lab processing to remove the human error in centrifuging, timing, etc. that added to variability of results.
Comment: 1

Bitcoin is an open network that exhibits resilience and anti-fragility

Over time, crypto-currency networks such as bitcoin will get stronger

If a crook gets access to the credit card or wire transfer networks, it’s a disaster. That’s because, as I explained in my recent article about security models, these traditional financial networks achieve trust by excluding bad actors through access control. Effective access control requires exclusivity and strict vetting, only a small carefully vetted group of “trusted actors” are granted control.

Bitcoin and other crypto-currencies based on the blockchain invention are different. Trust is based on computation, not access control. On the bitcoin network you trust math so everyone can have access. That also means that there will be bad actors, arguably just as there are on access control networks, and nuisance attacks. Fortunately, these types of attacks cannot affect the distributed asset ledger, the blockchain, because to achieve the level of trust to write into the ledger you must apply enormous distributed computation. The root of trust is in the majority of computing power, not individual actors or any central authority.

Read more…

Comment

Bitcoin security model: trust by computation

A shift from trusting people to trusting math.

Bitcoin is a distributed consensus network that maintains a secure and trusted distributed ledger through a process called “proof-of-work.”

Bitcoin fundamentally inverts the trust mechanism of a distributed system. Traditionally, as we see in payment and banking systems, trust is achieved through access control, by carefully vetting participants and excluding bad actors. This method of trust requires encryption, firewalls, strong authentication and careful vetting. The network requires investing trust in those gaining access.

The result is that such systems tend to be closed and small networks by necessity. By contrast, bitcoin implements a trust model of trust by computation. Trust in the network is ensured by requiring participants to demonstrate proof-of-work, by solving a computationally difficult problem. The cumulative computing power of thousands of participants, accumulated over time in a chain of increasing-difficulty proofs, ensures that no actor or even collection of actors can cheat, as they lack the computation to override the trust. As proof-of-work accumulates on the chain of highest difficulty (the blockchain), it becomes harder and harder to dispute. In bitcoin, a new proof-of-work is added every 10 minutes, with each subsequent proof making it exponentially more difficult to invalidate the previous results.

Read more…

Comments: 23
Four short links: 14 February 2014

Four short links: 14 February 2014

Bitcoin Analysis, 3D Crime Scenes, 3D Display, and Cloud API

  1. Bitcoin: Understanding and Assessing Potential Opportunities (Slideshare) — VC deck on Bitcoin market and opportunities, long-term and short-term. Interesting lens on the development and gaps.
  2. Queensland Police Map Crime Scenes with 3D Scanner (ComputerWorld) — can’t wait for the 3D printed merchandise from famous trials.
  3. Atheer LabsAn immersive 3D display, over a million apps, sub-mm 3D hand interaction, all in 75 grams.
  4. libcloudPython library for interacting with many of the popular cloud service providers using a unified API.
Comments: 2