Blog

Archive for the ‘blockchain’ tag

Aug 4, 2018

How will Bitcoin Work When Mining Rewards Run Out?

Posted by in categories: bitcoin, cryptocurrencies, economics, internet

Let us frame the question, by reviewing what miners really do…

Miners play a critical role in the Bitcoin network. Their activity (searching for a nonce) results in assembling an immutable string of blocks that corroborate and log the universal transaction record. They are the distributed bookkeepers that replace old-school banks in recording and vouching for everyone’s purchase or savings.

From the perspective of a miner, there is no obvious connection between their activity and the worldwide network of bitcoin transactions and record keeping. They are simply playing an online game and competing against thousands of other miners in an effort to solve a complex and ongoing math problem. As they arrive at answers to small pieces of the problem, they are rewarded with bitcoin, which can be easily translated into any currency.

What is the Problem?

Continue reading “How will Bitcoin Work When Mining Rewards Run Out?” »

Mar 12, 2018

John Oliver explains Bitcoin, Blockchain & Crypto (with precision & clarity)!

Posted by in categories: bitcoin, cryptocurrencies, economics, finance, internet

John Oliver is a crossover who bridges the art of a comedian with the reporting and perspective of a liberal political pundit. Even detractors acknowledge that Oliver addresses serious issues with unusual wit and humor.

I never thought Oliver could (or would) tackle the topic of cryptocurrency—at least not with value to the viewer. It is too geeky, and too esoteric. (It also cuts into my mission of evangelism and education). smile

He did, and he sparkles! Feel free to jump past the fluff. The Bitcoin tutorial starts at 3:40. Of course, my friend, Shechter, in Long Island New York will bust a gut over what Oliver says at 9:40. It is not only clear and concise, it is accurate and terribly funny!

Whether you are a Bitcoin newbie or a seasoned blockchain coder, this is the video you have been looking for. This one is durable.

Continue reading “John Oliver explains Bitcoin, Blockchain & Crypto (with precision & clarity)!” »

Mar 12, 2018

What sets cryptocurrencies apart from each other?

Posted by in categories: bitcoin, cryptocurrencies, economics, finance, internet

Today, I was asked to answer this question at Quora:

What sets each cryptocurrency apart from the others?

“Cryptocurrency” is a broad term. It refers to payment coins, of course—such as Bitcoin and Litecoin. But, because most tradeable tokens attain an asset value, the word is often used to refer to smart contract devices, such as Ethereum, a host of other blockchain based tokens, functional Internet-of-Things tokens, and even ICOs (Initial Coin Offerings). Since people treat ICOs and IOT tokens as investment instruments even if they are useless as a payment mechanism, they all fall within the realm of a cryptocurrency.

So, before addressing the question, let’s distinguish between Altcoins and ICOs. I assume the question refers to Altcoins, and not ICOs…

Continue reading “What sets cryptocurrencies apart from each other?” »

Mar 6, 2018

Have there been successful Transaction Malleability attacks?

Posted by in categories: bitcoin, cryptocurrencies, economics, finance, internet

First, let’s get some basics out of the way…

What is Transaction Malleability?

Here are 2 explanations of transaction malleability: [Coindesk] [TechTalk]

In a nutshell, Transaction Malleability is a weakness in the original Bitcoin implementation that enables a bad actor to change the unique ID of a bitcoin transaction before it is confirmed on the Blockchain. Such a change makes it possible for someone to pretend that a transaction didn’t happen, if all necessary conditions are in place.

Continue reading “Have there been successful Transaction Malleability attacks?” »

Jan 22, 2018

We Put The Entire Internet On The Blockchain—and You Can Too — By Erin Griffith | Wired

Posted by in category: internet

“Friday morning, David Tran, co-founder and CTO of PR-software startup Upbeat, did just that. Tran built and published a Chrome extension called On The Blockchain in around 15 minutes. Subtitle: “Everything is better on the blockchain.””

Read more

Jan 22, 2018

UN Supports Blockchain Technology for Climate Action | UNFCCC

Posted by in categories: bitcoin, environmental

“To encourage exploration and eventual use of this technology in support of climate action, the UN Climate Change secretariat initiated and facilitated the creation of the Climate Chain Coalition and contributed to the writing of its charter of principles and values … ”

Read more

Jan 14, 2018

Proof-of-Work Alternatives: Massive electric consumption by cryptocurrency mining

Posted by in categories: bitcoin, cryptocurrencies, economics, energy, environmental

Some blogs and news outlets eschew long titles. Publishers want readers to scan a list of topics that fit on one-line each. But, a better title for this article would be:

“Massive electric consumption by cryptocurrency mining:
An unfortunate environmental nightmare will soon pass!
… Proof-of-Work alternatives are on the horizon”

A considerable amount of electricity is used in the process of mining Bitcoin and other cryptocurrencies. Miners are effectively distributed bookkeepers, and this use of resources is part of a system called “proof-of-work”. It keeps the books fair, honest, and without an ability for the miners to collude (In other words, they cannot ‘cook the books’).

Continue reading “Proof-of-Work Alternatives: Massive electric consumption by cryptocurrency mining” »

Jan 1, 2018

How does the Blockchain ‘know’ you have printed a paper wallet?

Posted by in categories: bitcoin, cryptocurrencies, economics, internet

Let’s say that you no longer trust your currency exchange to host your Bitcoin wallet and you don’t trust a Trezor or Nano hardware wallet. You don’t trust your memory and you don’t trust your kids. And you certainly know better than to keep your wealth in your PC or phone. That would be downright crazy—right? What can you do?!

A growing number of people are printing paper wallets. It is the ultimate form of security. Some individuals even delete their cloud wallet, leaving everything to a string of hex characters or a QR code printed onto a slip of paper. (NB. You had better be certain that you and a few trusted individuals know how to find that piece of paper!)

But here’s an interesting mystery. If you print the paper wallet off-line and delete your other wallets, then how can the blockchain ‘know’ that you have changed wallets? The short answer: It doesn’t and you haven’t!

Let’s explore a bit deeper…

Continue reading “How does the Blockchain ‘know’ you have printed a paper wallet?” »

Dec 29, 2017

Should we ‘out’ Bitcoin creator, Satoshi?

Posted by in categories: bitcoin, cryptocurrencies, economics

Everyone likes a good mystery. After all, who isn’t fascinated with Sherlock Holmes or the Hardy Boys? The thirst to explore a mystery led us to the New World, to the ocean depths and into space.

One of the great mysteries of the past decade is the identity of Satoshi Nakamoto, the inventor of Bitcoin and the blockchain. Some have even stepped forward in an effort to usurp his identity for fame, infamy or fortune. But in this case, we have a mystery in which the subject does not wish to be fingered. He prefers anonymity.

This raises an interesting question. What could be achieved by discovering or revealing the identity of the illusive Satoshi Nakamoto?…

The blockchain and Bitcoin present radically transformative methodologies with far ranging, beneficial impact on business, transparency and social order.

Continue reading “Should we ‘out’ Bitcoin creator, Satoshi?” »

Jun 28, 2017

World Economic Forum blockchain report calls for ‘multi-stakeholder collaboration’ — By Ian Allison | International Business Times

Posted by in categories: cryptocurrencies, governance, policy

“A report outlining how blockchain technology will usher in a new era of the internet has been published by the World Economic Forum at its 11th Annual Meeting of the New Champions, taking place on 27–29 June in Dalian, People’s Republic of China.”

Read more

Page 1 of 41234