Attacks that unmask anonymous blockchain transactions can be used against everyone who ever relied on the defective technique

In An Empirical Analysis of Traceability in the Monero Blockchain, a group of eminent computer scientists analyze a longstanding privacy defect in the Monero cryptocurrency, and reveal a new, subtle flaw, both of which can be used to potentially reveal the details of transactions and identify their parties. Read the rest

Excellent explainer: how consensus algorithms (including Bitcoin/blockchain) work

The creation of "public ledgers" -- like blockchain, popularized by Bitcoin -- requires "consensus algorithms" that allow mutually untrusted, uncoordinated parties to agree on a world-readable, distributed list of things (domain names, transactions, title deeds, etc), something that cryptography makes possible in a variety of ways. Read the rest

Google: Chrome will no longer trust Symantec certificates, 30% of the web will need to switch Certificate Authorities

In 2012, Google rolled out Certificate Transparency, a clever system to spot corrupt "Certificate Authorities," the entities who hand out the cryptographic certificates that secure the web. If Certificate Authorities fail to do their jobs, they put the entire electronic realm in danger -- bad certificates could allow anything from eavesdropping on financial transactions to spoofing industrial control systems into accepting malicious software updates. Read the rest