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Argentina’s Immigration Office Faces A Ransomware Attack; Hackers Demand $4M In Bitcoin

Argentina’s official immigration ministry faces a ransomware attack, paralyzing checkpoints and getting into and out of the country for four hours. A criminal complaint filed by Argentina's cybercrime agency, Unidad Fiscal Especializada en Ciberdelincuencia, shows that several checkpoints across the country could not function on Aug 27 from 7 AM local time. дальше »

2020-9-7 15:59


A Guide to 99% Fault Tolerant Consensus

Special thanks to Emin Gun Sirer for review We’ve heard for a long time that it’s possible to achieve consensus with 50% fault tolerance in a synchronous network where messages broadcasted by any honest node are guaranteed to be received by all other honest nodes within some known time period (if an attacker has more than 50%, they can perform a “51% attack”, and there’s an analogue of this for any algorithm of this type). дальше »

2018-8-9 04:03