A hard look at the wastefulness of "proof of work," the idea at the core of the blockchain

David Gerard is a technically minded, sharp-witted, scathing critic of Bitcoin and other cryptocurrencies; his criticism is long, comprehensive and multipartite, but of particular interest is is critique of "proof of work" (an idea that is central to the blockchain, but which many cryptographers are skeptical of). Read the rest

More anti-money laundering measures hit China as top three Bitcoin exchanges freeze withdrawals

Bitcoin's spiking prices have been driven almost entirely by Chinese money-launderers trying to beat the country's currency controls -- controls that have tightened so much that it's tanking the world's real-estate markets as offshore buyers abandon their deposits and disappear. Read the rest

Free Bitcoin textbook from Princeton

The Princeton Bitcoin Book by Arvind Narayanan, Joseph Bonneau, Edward Felten, Andrew Miller and Steven Goldfeder is a free download -- it's over 300 pages and is intended for people "looking to truly understand how Bitcoin works at a technical level and have a basic familiarity with computer science and programming." Read the rest