The Blockchain Stack – Mechanism Labs – Medium

algorithms | blockchain | ecosystem | hardware | Research Notes

At a fundamental level, blockchains are composed of multiple distinct layers, similar to other technology protocols like the internet paradigm (Link, Network, Internet, Transport, Application). Here, we present a framework of the layers that compose blockchains. The layers are defined such that each layer depends on the one(s) below it. Here, we discuss what each layer provides as opposed to how each layer is implemented.

Source: The Blockchain Stack – Mechanism Labs – Medium

Algorithmic regulation and rule of law | Mireille Hildebrandt

algorithms | law | papers | Research Notes

In this brief contribution, I distinguish between code-driven and data-driven regulation as novel instantiations of legal regulation. Before moving deeper into data-driven regulation, I explain the difference between law and regulation, and the relevance of such a difference for the rule of law. I discuss artificial legal intelligence (ALI) as a means to enable quantified legal prediction and argumentation mining which are both based on machine learning. This raises the question of whether the implementation of such technologies should count as law or as regulation, and what this means for their further development. Finally, I propose the concept of ‘agonistic machine learning’ as a means to bring data-driven regulation under the rule of law. This entails obligating developers, lawyers and those subject to the decisions of ALI to re-introduce adversarial interrogation at the level of its computational architecture.

Source: Algorithmic regulation and rule of law | Philosophical Transactions of the Royal Society of London A: Mathematical, Physical and Engineering Sciences

The Crypto Governance Manifesto – Amentum – Medium

algorithms | applications | blockchain | governance | papers | Research Notes

If a miner controls an economy of scale (i.e. PoW hardware manufacturing), they ultimately control the liquidity/velocity flow of the State/Federal level cryptos that are derived from those root chains, given a lack of market competition. Therefore, direct influence over said monopolistic entities are then tightly-coupled to future tokenized cities/states, which means that entire political-monetary interfaces, globally, if adopted and built upon, could be centralizing governance in ways many might not immediately realize — until it’s too late.

Source: The Crypto Governance Manifesto – Amentum – Medium

51% Percent Attacks: Hacking a $2 Billion Dollar Cryptocurrency for Less Than $1.5 Million –

algorithms | bitcoin | consensus mechanisms | critique | cryptocurrencies | papers | Research Notes

Cryptocurrency researchers from FECAP University in Brazil have shown that it would take only around $1.5 million to attack the ETC network and still pull a nice little profit. With $55 million dollars, you could effectively bankrupt the currency, netting nearly $1 billion in straight profit.If a party that controlled just 2.5% of the Ethereum hash rate switched to ETC, they’d instantly control over 51% of the total network hash rate. The attack wouldn’t even be absurdly expensive. It’d cost what you would earn mining on the ETH network with 2.5% of the hash rate, which equates to roughly 525 ETH, or $318,000.

Source: 51% Percent Attacks: Hacking a $2 Billion Dollar Cryptocurrency for Less Than $1.5 Million –

What do AI and blockchain mean for the rule of law? | TechCrunch

algorithms | blockchain | people | related_projects | Research Notes

Blockchain “freezes the future”, argues Hildebrandt, admitting of the two it’s the technology she’s more skeptical of in this context. “Once you’ve put it on a blockchain it’s very difficult to change your mind, and if these rules become self-reinforcing it would be a very costly affair both in terms of money but also in terms of effort, time, confusion and uncertainty if you would like to change that.

Source: What do AI and blockchain mean for the rule of law? | TechCrunch

The State of Cryptocurrency Mining – Sia Blog

algorithms | blockchain | hardware | quantitative analysis | Research Notes

A few months ago, it was publicly exposed that ASICs had been developed in secret to mine Monero. My sources say that they had been mining on these secret ASICs since early 2017, and got almost a full year of secret mining in before discovery. The ROI on those secret ASICs was massive, and gave the group more than enough money to try again with other ASIC resistant coins.It’s estimated that Monero’s secret ASICs made up more than 50% of the hashrate for almost a full year before discovery, and during that time, nobody noticed. During that time, a huge fraction of the Monero issuance was centralizing into the hands of a small group, and a 51% attack could have been executed at any time.

Source: The State of Cryptocurrency Mining – Sia Blog

On Radical Markets

algorithms | blockchain | decentralization | discourse | ecosystem | governance | opinion | papers | politics | regulation | Research Notes | smart contracts

Another Kind of Radical Market

The book as a whole tends to focus on centralized reforms that could be implemented on an economy from the top down, even if their intended long-term effect is to push more decision-making power to individuals. The proposals involve large-scale restructurings of how property rights work, how voting works, how immigration and antitrust law works, and how individuals see their relationship with property, money, prices and society. But there is also the potential to use economics and game theory to come up with decentralized economic institutions that could be adopted by smaller groups of people at a time.

Perhaps the most famous examples of decentralized institutions from game theory and economics land are (i) assurance contracts, and (ii) prediction markets. An assurance contract is a system where some public good is funded by giving anyone the opportunity to pledge money, and only collecting the pledges if the total amount pledged exceeds some threshold. This ensures that people can donate money knowing that either they will get their money back or there actually will be enough to achieve some objective. A possible extension of this concept is Alex Tabarrok’s dominant assurance contracts, where an entrepreneur offers to refund participants more than 100% of their deposits if a given assurance contract does not raise enough money.

Prediction markets allow people to bet on the probability that events will happen, potentially even conditional on some action being taken (“I bet $20 that unemployment will go down if candidate X wins the election”); there are techniques for people interested in the information to subsidize the markets. Any attempt to manipulate the probability that a prediction market shows simply creates an opportunity for people to earn free money (yes I know, risk aversion and capital efficiency etc etc; still close to free) by betting against the manipulator.

Posner and Weyl do give one example of what I would call a decentralized institution: a game for choosing who gets an asset in the event of a divorce or a company splitting in half, where both sides provide their own valuation, the person with the higher valuation gets the item, but they must then give an amount equal to half the average of the two valuations to the loser. There’s some economic reasoning by which this solution, while not perfect, is still close to mathematically optimal.

One particular category of decentralized institutions I’ve been interested in is improving incentivization for content posting and content curation in social media. Some ideas that I have had include:

  • Proof of stake conditional hashcash(when you send someone an email, you give them the opportunity to burn $0.5 of your money if they think it’s spam)
  • Prediction markets for content curation(use prediction markets to predict the results of a moderation vote on content, thereby encouraging a market of fast content pre-moderators while penalizing manipulative pre-moderation)
  • Conditional payments for paywalled content (after you pay for a piece of downloadable content and view it, you can decide after the fact if payments should go to the author or to proportionately refund previous readers)

And ideas I have had in other contexts:

Twitter scammers: can prediction markets incentivize an autonomous swarm of human and AI-driven moderators to flag these posts and warn users not to send them ether within a few seconds of the post being made? And could such a system be generalized to the entire internet, where these is no single centralized moderator that can easily take posts down?

Some ideas others have had for decentralized institutions in general include:

I would be interested in hearing Posner and Weyl’s opinion on these kinds of “radical markets”, that groups of people can spin up and start using by themselves without requiring potentially contentious society-wide changes to political and property rights. Could decentralized institutions like these be used to solve the key defining challenges of the twenty first century: promoting beneficial scientific progress, developing informational public goods, reducing global wealth inequality, and the big meta-problem behind fake news, government-driven and corporate-driven social media censorship, and regulation of cryptocurrency products: how do we do quality assurance in an open society?

All in all, I highly recommend Radical Markets(and by the way I also recommend Eliezer Yudkowsky’s Inadequate Equilibria) to anyone interested in these kinds of issues, and look forward to seeing the discussion that the book generates.

Blockchain Protocol Analysis and Security Engineering 2017 | Cyber Initiative

algorithms | blockchain | consensus mechanisms | cryptocurrencies | decentralization | governance | issues/conflicts | papers | people | privacy | quantitative analysis | Research Notes | smart contracts | tools

The conference will explore the use of formal methods, empirical analysis, and risk modeling to better understand security and systemic risk in blockchain protocols.  The conference aims to foster multidisciplinary collaboration among practitioners and researchers in blockchain protocols, distributed systems, cryptography, computer security, and risk management.

Source: Blockchain Protocol Analysis and Security Engineering 2017 | Cyber Initiative

Market Structure in Bitcoin Mining by June Ma, Joshua S. Gans, Rabee Tourky :: SSRN

algorithms | bitcoin | papers | quantitative analysis | Research Notes


We analyze the Bitcoin protocol for electronic peer-to-peer payments and the operations that support the “blockchain” that underpins it. It is shown that the protocol maps formally into a dynamic game that is an extension of standard models of R&D racing. The model provides a technical foundation for any economic analysis of ‘proof-of-work’ protocols. Using the model, we demonstrate that free entry is solely responsible for determining resource usage by the system for a given reward to mining. The endogenous level of computational difficulty built into the Bitcoin protocol does not mitigate this usage and serves only to determine the time taken to process transactions. Regulating market structure will mitigate resource use highlighting the importance of identifying the benefits of competition for the operation of the blockchain.

Keywords: bitcoin, blockchain, racing, mining, competition, free entry

Source: Market Structure in Bitcoin Mining by June Ma, Joshua S. Gans, Rabee Tourky :: SSRN