blockchain

The prominent hacker and Ethereum developer Virgil Griffith was arrested by the US government Friday after he spoke at an April conference on blockchain technologies in North Korea. The US government considers his presentation to be a transfer of technology—and therefore a violation of US sanctions.

But Griffith's defenders, including Ethereum founder Vitalik Buterin, describe the arrest as a massive overreaction. Griffith worked for the Ethereum Foundation, and Buterin called him a friend.

“Blockchain, it’s an immutable distributed ledger,” is something we’ve all heard from bitcoin enthusiasts time and time again, but what does that really mean? How safe is it? How can we secure tech’s most secure technology?

An immutable distributed ledger sounds complicated but at its core, the idea is simple: blockchain works as a shared record of information that multiple parties reference and can observe any addition made to it.

In a café on the Upper East Side of Manhattan, a one-time videogame developer turned political theorist named Santiago Siri is trying to explain to me how his nonprofit startup, Democracy.Earth, aims to fix the world’s broken politics with the help of the blockchain.

L33tdawg: Want to hack Ethereum smart contracts? This #HITB2018AMS talk has the info you need.

A scan of nearly one million Ethereum smart contracts has identified 34,200 vulnerable contracts that can be exploited to steal Ether, and even freeze or delete assets in contracts the attackers don't own.

Developers of Ethereum, the world's No. 2 digital currency by market capitalization, have closed a serious security hole that allowed virtually anyone with an Internet connection to manipulate individual users' access to the publicly accessible ledger.