FastActivate 04 04 2013

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Firm Size, 2011 exhibit 1.3 23 Average Monthly and Annual Premiums for Covered Workers, by Plan Type and Region, 2011 exhibit 1.4 24 Average Monthly and Annual Premiums for Covered Workers, by Plan Type and Industry, 2011 exhibit 1.5 26 Average Annual Premiums for Covered Workers with Single Coverage, by Firm Characteristics, 2011 exhibit 1.6 27.

I'm a technology, privacy, and information security reporter and most recently the author of the book, a chronicle of the history and future of information leaks, from the Pentagon Papers to WikiLeaks and beyond. I've covered the hacker beat for Forbes since 2007, with frequent detours into digital miscellania like switches, servers, supercomputers, search, e-books, online censorship, robots, and China. My favorite stories are the ones where non-fiction resembles science fiction. My favorite sources usually have the word 'research' in their titles. How to install windows 7 for free.

Since I joined Forbes, this job has taken me from an autonomous car race in the California desert all the way to Beijing, where I wrote the first English-language cover story on the Chinese search billionaire Robin Li for Forbes Asia. Black hats, white hats, cyborgs, cyberspies, idiot savants and even CEOs are welcome to email me at agreenberg (at) forbes.com. My PGP public key can be found. A diagram from the Johns Hopkins paper on Zerocoin shows how it theoretically adds untraceability to Bitcoin's network. In (a), a Bitcoin is traced through several transactions. In (b), it's traded for an untraceable Zerocoin and later redeemed for another Bitcoin. The dotted line represents the impossibility of connecting the two trades.

Many users of the crypto-currency Bitcoin see it as the first fully anonymous and untraceable currency. But with the addition of a clever piece of code called Zerocoin, it could still fulfill that dream of truly private payments. Zerocoin, the work of a group of cryptographers at John Hopkins University who plan to present their system at next month’s IEEE Security and Privacy conference in San Francisco, offers an extension to Bitcoin that would make the task of identifying Bitcoin users or tracing their transactions nearly impossible. If adopted by enough of the Bitcoin network, Zerocoin’s inventors believe it could become a fundamental upgrade to Bitcoin’s code, integrating itself into the currency and solving what many see as serious privacy flaws in Bitcoin’s current implementation. “A lot of people have tried to make systems of anonymous digital cash over the years, and they’ve failed. Bitcoin has almost made it, but it’s come just a little short,” says Matthew Green, the computer science professor who designed Zerocoin along with graduate students Ian Miers and Christina Garman.

“How do we get it that last ten percent of the way? It’s taken us nearly two years to come up with the answer, and this is what we’ve got.” To understand Zerocoin’s significance, consider Bitcoin’s strange properties as both one of the most private and most public payment systems ever invented; Bitcoin is private because it doesn’t need to be issued or stored by banks, and can be spent on the Internet with cash-like advantages, such as never requiring the user to reveal his or her name or register an account. But Bitcoin is also public, in that every transaction is documented by everyone who uses Bitcoin and can be traced to the user’s digital address, part of the function of the currency that prevents fraudulent transactions.