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Andy Greenberg wrote a long article — an excerpt from his new book — on how law enforcement de-anonymized bitcoin transactions to take down a global child porn ring. Within a few years of Bitcoin’s arrival, academic security researchers — and then companies like Chainalysis — began to tear gaping holes in the masks separating … Read More “De-anonymizing Bitcoin” »
I was quoted in BuzzFeed: “My problem with contact tracing apps is that they have absolutely no value,” Bruce Schneier, a privacy expert and fellow at the Berkman Klein Center for Internet & Society at Harvard University, told BuzzFeed News. “I’m not even talking about the privacy concerns, I mean the efficacy. Does anybody think … Read More “Me on COVID-19 Contact Tracing Apps” »
Google and Apple have announced a joint project to create a privacy-preserving COVID-19 contact tracing app. (Details, such as we have them, are here.) It’s similar to the app being developed at MIT, and similar to others being described and developed elsewhere. It’s nice seeing the privacy protections; they’re well thought out. I was going … Read More “Contact Tracing COVID-19 Infections via Smartphone Apps” »
Researchers have exploited a flaw in the cryptocurrency Monero to break the anonymity of transactions. Research paper. BoingBoing post. Powered by WPeMatico
Ross Anderson has a really interesting paper on tracing stolen bitcoin. From a blog post: Previous attempts to track tainted coins had used either the “poison” or the “haircut” method. Suppose I open a new address and pay into it three stolen bitcoin followed by seven freshly-mined ones. Then under poison, the output is ten … Read More “Tracing Stolen Bitcoin” »