Flash loans are a recent blockchain smart contract construct that enable the issuance of loans that are only valid within one transaction and must be repaid by the end of that transaction. This post examines recent flash loan attacks on DeFi, and outlines how they could have been far more effective, boosting attack profitability to 829K USD (instead of 350K USD) and 1.1M USD (instead of 600K USD), respectively.
I make the case that the current trend towards outsourcing functions out of universities to third-party providers constitutes a security vulnerability, and that progressive institutions need to resist this trend to fight large-scale surveillance operations.
In a new analysis of Bitcoin mining, Ittay Eyal shows that the equilibrium between miners is unstable, and identifies a stable equilibrium that might, as a side effect, reduce the size of open, public mining pools.
It's time to secure data in NoSQL databases with strong
guarantees, at fine granularity, and with low overhead.
Macaroons, from Google, are designed for this purpose. This
post shows have Macaroons can be used in HyperDex to secure
We outline a small change to the Bitcoin mining protocol that rules out big, public mining pools. It preserves the current investment in Bitcoin by both existing users and by existing miners. It presents a fix to GHash's recent 51% excursion.
A Bitcoin mining pool, called GHash and operated by an anonymous entity called CEX.io, just reached 51% of total network mining power today. Bitcoin is no longer decentralized. This note describes what we should do about it.
Macaroons provide a safer way to authenticate users than using raw
cookies. In this article, we walk through how to get started with
the macaroons library, and how to create and verify your first