/Boudewijn Rooseboom

About Boudewijn Rooseboom

This author has not yet filled in any details.
So far Boudewijn Rooseboom has created 114 blog entries.

Business Insider | There are now 50 funds dedicated to cryptocurrencies

Hedge funds are cashing in on bitcoin mania — there are now 50 dedicated to cryptocurrencies
The market for cryptocurrencies is red-hot, and dozens of crypto-focused hedge funds are looking to get in on the action.

Digital currencies, such as Bitcoin, are powered by distributed ledger technology and are not controlled by a centralized authority. The […]

19 September 2017|

Blockchain bricks: Request is built upon 0x, Civic and Aragon

Blockchain has one strength that is yet to be used: interoperability.
While the finance world is hiding behind black boxes to protect their system, Blockchain allows to create systems that can be used by anyone.
All projects can benefit from each other’s and create a strong network effect as the bricks are created.
This is the exact reason […]

13 September 2017|

Cryptographic vulnerabilities in IOTA

Last month, Ethan Heilman, Tadge Dryja, Madars Virza, and I took a look at IOTA, currently the 8th largest cryptocurrency with a $1.9B market cap. In its repositories on GitHub, we found a serious vulnerability — the IOTA developers had written their own hash function, Curl, and it produced collisions (when different inputs hash to the same output).

13 September 2017|

2014: OpenBazaar, 2017: Still OpenBazaar

There are huge differences between running a company or business and running a free and open source software project. This story is about what it’s like to straddle the line and lead both simultaneously. Separation of these roles is not easy and doing the right thing isn’t always clear, but your dedication says a lot […]

13 September 2017|

Verzekeraars storten zich op blockchain

Een groep van vijftien verzekeraars, waaronder Aegon en Achmea uit Nederland, gaat samenwerken om blockchain te kunnen inzetten voor herverzekeringsproducten. Ze denken al volgend jaar diensten te kunnen aanbieden met deze techniek, die vooral bekend is als het protocol achter de digitale munt bitcoin.


11 September 2017|

Mijn bitcoins brand ik op een dvd en die gaat in de kluis

Is het de grootste financiële zeepbel van dit moment of de toekomst van ons geldsysteem? Cryptomunten zoals de bitcoin zijn het gesprek van de dag onder beleggers, ook in Nederland. De koersstijgingen van deze valuta’s zijn ongekend en de eerste ‘bitcoinmiljonairs’ zijn al gespot.


11 September 2017|

European Banking Authority’s opinion on ‘virtual currencies’

4 July 2014

One of the tasks of the EBA is to monitor new and existing financial activities and to adopt guidelines and recommendations with a view to promoting the safety and soundness of markets and convergence of regulatory practice. In September 2013, ‘virtual currencies’ emerged on the EBA’s radar as one of the many innovations […]

6 September 2017|

Continued Discussion on why Lightning Network Cannot Scale

I’d like to thank everyone in the Bitcoin community that took the time to read an article I published this week called “Mathematical Proof That the Lightning Network Cannot Be a Decentralized Bitcoin Scaling Solution”
This is a quick follow-up to clear up some misunderstandings and objections that people have.

6 September 2017|

A (brief and incomplete) history of censorship in /r/Bitcoin

Please do not use the censored /r/bitcoin or Bitcointalk. Use /r/btcinstead.

The free and open discussions on this forum help individuals and the Bitcoin community achieve Truth. Everyone has some wisdom or knowledge to contribute to a discussion, and everyone who reads the discussion and gains that knowledge gets closer to the Truth. This is much more effective […]

31 August 2017|

Plasma: Scalable Autonomous Smart Contracts

Plasma is a proposed framework for incentivized and enforced execution of smart contracts which is scalable to a significant amount of state updates per second (potentially billions) enabling the blockchain to be able to represent a significant amount of decentralized financial applications worldwide. These smart contracts are incentivized to continue operation autonomously via network transaction […]

17 August 2017|

A definition of “Bitcoin”

Engineers are great at not seeing the forest for the trees. They get stuck on details and lose track of the bigger picture.


17 August 2017|

Breaking open the MtGox case, part 1

July 27, 2017
Earlier today news broke of an arrest in Greece of a Russian national suspected of running a large-scale money laundering operation focused on Bitcoin. The man has since been publicly identified as Alexander Vinnik, 38, and over $4 billion USD is said to have been trafficked through the operation since 2011.


3 August 2017|

Bitcoin Cash: What You Need to Know

Bitcoin Cash’s sudden announcement on Saturday that they’ll go ahead with a fork on August 1 caught a lot of people, including myself, by surprise. In this article, I’m going to explain what Bitcoin Cash (aka BCC) is, how it affects you and how you should prepare for August 1.

26 July 2017|

Bring on the Chain Split

In a previous essay, I examined the unlikelihood of a Bitcoin chain split. At the time, hashrate signaling for larger blocks was increasing daily and the prospect of a miner supermajority hard fork appeared likely.

28 June 2017|

UAHF: A contingency plan against UASF (BIP148)


UASF: User Activated Soft Fork. Developers add a mandatory rule set to change the node’ software, invalidating certain kinds of previously valid blocks after a flag day. This method requires no mining majority to support or activate a chain-split. The UASF proposal intends to make a 51% attack against the blockchain that has the majority […]

15 June 2017|

The new cryptocurrency gold rush: digital tokens that raise millions in minutes

About a dozen rain-soaked people were crammed between the revolving doors and security barriers in the lobby of New York University’s Stern School of Business as torrents pelted down outside. All desperately wanted in to the hottest ticket in town, one that promised to make some of them overnight millionaires, if not billionaires. Among them […]

9 June 2017|

A Short Note on the Silbert Accord

The best part of the Silbert Accord is that it was negotiated between the relevant parties: the producers of block space (miners) and the consumers of block space (Bitcoin businesses on behalf of their users). Bitcoin has a tendency of annihilating gate keepers and this meeting was a step towards the disintermediation of another group […]

5 June 2017|

Enabling off-chain artificial intelligence for Ethereum with iExec

What is Artificial Intelligence ?
Artificial Intelligence is commonly understood as the capacity for a machine or a system to mimic a human-like intelligence through cognitive processes like “learning” and “problem solving”. In the field of computing, the technologies closest to this paradigm are machine learning and deep learning. However, more generally, AI represents the ability […]

5 June 2017|

JPMorgan Chase To Integrate Zcash Technology To Its Enterprise Blockchain Platform

Bitcoin was once (and, to some extent, still is) tainted by its association with illicit activity. But as a number of criminals have found out, transactions in Bitcoin can be tracked. So when Zcash, a so-called privacy coin, launched last October, it raised questions about who would want to use such a currency that had the […]

24 May 2017|

Ever owned a digital book signed by the author? No you haven’t.

Let’s talk about ownership. What does it mean when you own something? How do you start owning something?
At the foundation of the superstructure of ownership lies the right to possess — to have exclusive physical control of a thing. Owning a physical book, for example, is pretty straightforward: after you purchase it or get it as […]

29 April 2017|

Central banks step up efforts to launch digital currencies

2017 looks to be shaping up as a watershed year for blockchain-driven central bank digital currencies with China reportedly moving closer to becoming the first major economy in the world to issue its own virtual currency and several other countries including Sweden and South Africa very seriously looking to do the same.

According to a report […]

16 April 2017|

The Meaning of Decentralization


“Decentralization” is one of the words that is used in the cryptoeconomics space the most frequently, and is often even viewed as a blockchain’s entire raison d’être, but it is also one of the words that is perhaps defined the most poorly. Thousands of hours of research, and billions of dollars of […]

12 April 2017|

Why Ethereum is great for payments

Tech people love cool new things, and when we talk about Ethereum we hardly ever talk about it as a way of doing things Bitcoin could already do. But the experience of using Bitcoin to pay for things is getting increasingly painful, and it’s time has come to look at how Ethereum could help.
Ethereum […]

3 April 2017|

How ethereum could shard the web

Given the state of our 25-year old web and all the problems inherited from legacy 1970’s systems design, we should pause and take inventory of those components which are fundamentally broken and would offer a substantial return on development investment. Intersecting this concern with security, privacy, and censorship resistance, […]

3 April 2017|

Business Giants to Announce Creation of a Computing System Based on Ethereum

SAN FRANCISCO — Microsoft, JPMorgan Chase and other corporate giants are joining forces to create a new kind of computing system based on the virtual currency network Ethereum.
Some 30 companies are set to announce on Tuesday the formation of the Enterprise Ethereum Alliance, which will create a standard version of the Ethereum software that […]

3 April 2017|

Is Ethereum The New Bitcoin?


Why is Ethereum sudden rise?

During the last month, Ether, or the digital asset that fuels the whole Ethereum blockchain, has grown more than 300%, reaching its all time high of about $60 a few days ago.
At present time, Ether has a value of $50.59 with a market capitalization of $4,469,204,016, […]

3 April 2017|

Two Theories of Bitcoin


There are two primary schools of thought on what makes Bitcoin’s properties dependable, and thus what makes Bitcoin a suitable sound money. Which of these theories one believes, whether implicitly or explicitly, will inform one’s assessment of the best approach to making changes or upgrades to Bitcoin. An exploration of these two […]

16 March 2017|

State of Digital Asset Management Platforms


Last week Melonport had one of the fastest crowd sales to date. In an Ethereum based crowd sale, they raised 227,000 eth in 2 minutes and 50 seconds. Together with ICONOMI’s ICO, also one of the most successful crowdfunds ever I think it’s safe to say the interest and expectations […]

1 March 2017|

State of the Bitcoin Network

Wednesday February 15, 2017 at 10:18 AM
Distribution of 5743 full nodes obtained from (Jan 9th, 2017)
The Bitcoin network is similar to a living organism. It continuously undergoes rapid changes in terms of distribution, size, and quality of its components. Its evolution impacts the security and the performance of the whole system.


22 February 2017|

Blockchain is een blijvertje, ondanks de kinderziektes

De Blockchain kan onder meer vluchtelingen, zzp’ers en overheden helpen, maar staat ook nog in de kinderschoenen. “Het is pionieren.”

Wie zicht verdiept in de technologie Blockchain leest aan de ene kant de ronkende artikelen die vertellen dat deze nieuwe technologie vergelijkbaar is met die van het internet: ontwrichtend en revolutionair. En aan de andere kant de […]

16 February 2017|

JP Morgan, Santander Said to Join New Ethereum Blockchain Group

New details have emerged about a soon-to-be-launched initiative focused on enterprise uses of the ethereum protocol.

Dubbed Enterprise Ethereum, the project’s founding membership is said to include major financial institutions, tech giants and natural resources companies. According to sources, participating firms include JP Morgan, CME Group, BNY Mellon, Banco Santander, Microsoft, Red Hat, Cisco, Wipro and British Petroleum, among […]

15 February 2017|

Blockchain voor dummies – 5 vragen aan Blockchain expert Rutger van Zuidam

Van 10 tot en met 12 februari vindt de grootste fysieke blockchain hackathon ter wereld plaats in de Big Building in Groningen. Een weekend lang werken meer dan 45 teams aan nieuwe en innovatieve manieren om de maatschappij te verbeteren met behulp van op blockchain gebaseerde oplossingen. 

Maar wat is blockchain nu eigenlijk? En wat maakt […]

10 February 2017|

A definition of “Bitcoin”

Engineers are great at not seeing the forest for the trees. They get stuck on details and lose track of the bigger picture.

I’ve seen it most often (and have been guilty myself) when they’re optimizing something to make it faster. They’ll start out OK– “it is taking eleven seconds to agitate […]

8 February 2017|

Herdefiniëring van control – Blockchain

Blockchain is een nieuwe technologie die helpt bij het opbouwen van vertrouwen en heeft daarmee een zeer betekenisvolle impact op de samenleving. Blockchain zal de wereld en daarmee de control en de verantwoording blijvend veranderen. Blockchain is een digitale handdruk en wordt gezien als de grootste technologische innovatie sinds het […]

2 February 2017|

The Excessive-Block Gate: How a Bitcoin Unlimited Node Deals With “Large” Blocks


Bitcoin Unlimited’s consensus layer is concerned with preserving the money property of Bitcoin. Blocks that are potentially problematic to accept for technical reasons are dealt with in a different layer where network consensus is not critical. This article describes how Bitcoin Unlimited’s excessive-block logic works […]

1 February 2017|

On Inflation, Transaction Fees and Cryptocurrency Monetary Policy

The primary expense that must be paid by a blockchain is that of security. The blockchain must pay miners or validators to economically participate in its consensus protocol, whether proof of work or proof of stake, and this inevitably incurs some cost. There are two ways to […]

13 January 2017|

A proof stake design philosophy


Systems like Ethereum (and Bitcoin, and NXT, and Bitshares, etc) are a fundamentally new class of cryptoeconomic organisms — decentralized, jurisdictionless entities that exist entirely in cyberspace, maintained by a combination of cryptography, economics and social consensus. They are kind of like BitTorrent, but they are also not like BitTorrent, as BitTorrent […]

13 January 2017|

2017 Blockchain predictions

Herein lies 17 decentralized technology predictions for 2017. Thank you to all of my colleagues for my continued education this year and feedback in writing this piece. Please take these predictions with a grain of holiday salt, in other words, not meant to be construed as professional advice. […]

28 December 2016|

Five things every investor should know about Bitcoin

Amid global economic instability and financial crisis, investors are becoming increasingly aware of Bitcoin and its advantages over traditional forms of assets and money. Although many investors remain wary of Bitcoin’s fluctuating price, there are five major aspects of Bitcoin which every investor must know about.


25 December 2016|

De bitcoin kruipt waar gewoon geld niet gaan kan

Nu steeds meer maatregelen worden getroffen die contant betalen belemmeren, biedt de bitcoin veelal een uitweg. De handel in de virtuele munt blijft maar toenemen en de waarde van de munt verdubbelde zelfs in één jaar tijd. Hoe werkt de bitcoin eigenlijk en wat wordt er […]

25 December 2016|

Segregated Witness: A Fork Too Far

This paper first examines Segregated Witness (SW), then demonstrates how it can only fail to realize its designed purpose, how it encumbers Bitcoin with irreversible technical debt, and how it threatens the fungibility of the currency. After reading this, it should be clear to miners why they should: […]

24 December 2016|

OMG, Ethereum Is So Hard Forked

Ethereum Learns To Use A Fork (And Other Signs Baby Is Growing Up)
We’ve been hearing some concern about Ethereum’s latest hard fork and how it affects the platform, so we thought we might explain what happened and attempt to clear up any misinformation.
Basically we think any consternation about recent (intentional and unintentional) forks […]

14 December 2016|

Iedereen denkt een blockchain-expert te zijn

Blockchain begint zo langzamerhand de hype te ontgroeien. De technologie wordt op steeds meer plekken succesvol toegepast. Dat gaat gevolgen hebben voor veel sectoren. Maar de kennis van zaken is nog gering. Het speeltje van echte nerds werd het favoriete speeltje van beleggers, al ging dat niet vanzelf. De waarde van bitcoin steeg eind november […]

12 December 2016|

Core Segwit – Thinking of upgrading? You need to read this!


So, voting on core’s implementation of Segwit is now enabled, and all 3 of the miners that support core have already cast their vote (2 pools and 1 cloud mining MLM), totalling about 23% of the network.  Adoption seems to have stalled (as of 4Dec16) as the […]

7 December 2016|

Sharding FAQ

What is sharding?
Currently, all blockchain protocols rely on a model where all nodes store all state (account balances, contract code and storage, etc) and process all transactions. This provides a large amount of security, but greatly limits blockchains’ scalability: a blockchain cannot process more transactions than a single node in the network. […]

3 December 2016|

The Excessive-Block Gate: How a Bitcoin Unlimited Node Deals With “Large” Blocks

Bitcoin Unlimited’s consensus layer is concerned with preserving the money property of Bitcoin. Blocks that are potentially problematic to accept for technical reasons are dealt with in a different layer where network consensus is not critical. This article describes how Bitcoin Unlimited’s excessive-block logic […]

23 November 2016|

A (brief and incomplete) history of censorship in /r/Bitcoin

Please do not use the censored /r/bitcoin or Bitcointalk. Use /r/btcinstead.

The free and open discussions on this forum help individuals and the Bitcoin community achieve Truth. Everyone has some wisdom or knowledge to contribute to a discussion, and everyone who reads the discussion and gains that […]

16 November 2016|

Blockchain en auteursrecht, gaat dot.blockchain (.BC) de muziekindustrie en copyright beheer veranderen?

Sinds december 2014 zijn er een aantal artikelen verschenen over de mogelijkheden van het gebruik van blockchain technologie in de muziekindustrie, in het bijzonder betreffende het beheren van auteursrechten. Eerst zal ik kort bespreken wat de blockchain is, daarna zal ik het dot.blockchain initiatief van Benji Rogers bespreken. […]

8 November 2016|

The invisible politics of Bitcoin: governance crisis of a decentralised infrastructure

Bitcoin is a decentralised currency and payment system that seeks to eliminate the need for trusted authorities. It relies on a peer-to-peer network and cryptographic protocols to perform the functions of traditional financial intermediaries, such as verifying transactions and preserving the integrity of the […]

2 November 2016|

ViaBTC Calls for a Bitcoin Hardfork

ViaBTC, which now controls around 15% of the network hashrate in combination with Roger Ver’s Bitcoin Unlimited pool, has called for a hardfork to upgrade bitcoin’s transaction capacity.

“Drop the matter of SegWit, let’s hard fork together,” followed by a resounding no to the question of whether there is anything core could do to make ViaBTC […]

18 October 2016|

Banken verdwijnen door opkomst blockchain

Door blockchain verdwijnt de helft van de banken, komen activistische aandeelhouders in zicht vanaf de eerste transactie en zullen centrale tegenpartijen voor het afhandelen van transacties overbodig worden. De versleuteltechniek heeft de potentie de financiële industrie op zijn kop te zetten.

Dat stelt David Yermack, hoogleraar aan de New Yorkse Stern […]

11 October 2016|

Heeft bitcoin de toekomst? Nee, maar de achterliggende blockchain-technologie wel. Hoe blockchain bij Bitcoin werkt.

In potentie heeft blockchain de capaciteit in zich om de wereld te veranderen op een schaal die te vergelijken is met de komst van internet. Geen wonder dat iedereen wil weten wat blockchain is. Vorige week legde ik de principes en werking van blockchain uit aan verzekeraars. Eerder mocht ik spreken voor accountants, bankiers, IT-auditors, […]

1 October 2016|

Ethereum’s future

By the end of this article, you’re going to understand blockchains in general (and Ethereum, a next-generation blockchain platform, in particular) well enough to decide what they mean to your life.

29 September 2016|

Bitcoin Unlimited: Articles of Federation

Bitcoin is at a crossroads that will determine whether it becomes a worldwide public good, embodying a trustless ledger and currency for all people, companies, and financial institutions worldwide. The Bitcoin Unlimited project seeks to provide a voice, in terms of code and hash power, to all stakeholders in the Bitcoin ecosystem. As a foundational […]

21 August 2016|

No, non-bitcoin blockchains are not “disrespectful” to Satoshi

In a recent interview with Tuur Demeester, Paul Sztorc made the interesting claim that “non-Bitcoin blockchains are disrespectful to Satoshi.” He has elsewhere and for a long time criticized non-Bitcoin digital assets of all forms. He generally refers to anyone not building exclusively with Bitcoin as a scammer, including me.


17 July 2016|

Towards massive on chain scaling: presenting our block propagation results with xthin

Part 1 of 5: Methodology

By Andrew Clifford, Peter R. Rizun, Andrea Suisani (@sickpig), Andrew Stone and Peter Tschipper. With special thanks to Jihan Wu from AntPool for the block source and to @cypherdoc and our other generous donors for the funds to pay for […]

14 July 2016|

A transaction fee market exists without a block size limit

This paper shows how a rational Bitcoin miner should select transactions from his node’s mempool, when creating a new block, in order to maximize his profit in the absence of a block size limit. To show this, the paper introduces the block space supply curve and the mempool demand curve. The former describes the cost […]

25 June 2016|

An examination of single-transaction blocks and their effect on network throughput and block size

The Bitcoin network’s creation of normal blocks and single (coinbase-only) transaction blocks is analyzed using multiple empirical approaches. A maximum Bitcoin network transaction commitment throughput of 60KB/sec is derived. The significant role of single-transaction blocks in limiting this throughput is then shown. The miner revenue equation in an unlimited-block environment is derived, and it is […]

13 June 2016|

Bitcoin block size political economy got the chance to sit down with respected Bitcoin thinker Konrad S. Graf and talk about the ongoing Bitcoin block size controversy. By applying the theories of political economy to the issue, Graf argues that the 1 MB block size limit is economically most similar to a government mandated output ceiling. To get the […]

4 May 2016|

The fundamental principles of bitcoin as “permissionless”, “uncensorable” MONEY

The entire debate transcends block sizes and gets to the fundamental principles of Bitcoin as “permissionless,” “uncensorable” money.
There exists one group of people who hold that Bitcoin has value specifically because, by design, it cannot be captured or censored by any actor or state. Honest […]

3 May 2016|

Block size: it’s economics & user preparation & moral hazard


Following the guiding WP principle of Assume Good Faith, I’ve been trying
to boil down the essence of the message following Scaling Bitcoin. There
are key bitcoin issues that remain outstanding and pressing, that are*
orthogonal to LN & SW*.


28 April 2016|

Bitcoin a peer-to-peer electronic cash system

A purely peer-to-peer version of electronic cash would allow online payments to be sent directly from one party to another without going through a financial institution. Digital signatures provide part of the solution, but the main benefits are lost if a trusted third party is still required to prevent double-spending. We propose a solution to […]

15 April 2016|

On block sizes

The Bitcoin block size issue is currently deadlocked, with nothing happening. Nor is anything going to happen: unlike what the community has been led to believe, the Bitcoin Core maintainers are not going to give the community a block size increase regardless of how many people want one.

In this article I will […]

10 April 2016|

Bitcoin upgrade governance hard forks and segregated witness

When considering upgrades of production systems, details of the transition can be as important as the theoretical end state goal being sought.
The two major updates currently being evaluated in the bitcoin community are a 2M hard fork, and a soft fork enabling Segregated Witness. Both upgrades […]

10 February 2016|