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Machine Unlearning as Private Retroactive Algorithms
A cs.CR paper defines private retroactive algorithms, showing machine unlearning is a data-maintenance problem and giving DP constructions for linear statistics, clustering, histograms.
The paper argues that machine unlearning's requirement to emulate retraining from scratch carries no meaningful privacy semantics against adversaries observing sequences of releases, recasting it as a data-maintenance question addressed by retroactive algorithms. It defines private retroactive algorithms, combining retroactivity with differential privacy under continual observation. Constructions achieve privacy and retroactivity at no asymptotic cost over privacy alone for linear statistics, clustering, and histograms, alongside impossibility results.
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Trump Targets Foreign Technology in New U.S. Power Grid Security Order
Trump's Executive Order 14420 declares a national emergency to restrict foreign-made bulk-power grid equipment over cyber, sabotage and supply-chain risks.
Executive Order 14420, signed August 26, declares a national emergency regarding the foreign supply of bulk-power system electric equipment to the United States. It empowers the Energy Secretary to restrict transactions with designated Covered Foreign Entities involving equipment, software, firmware, digital services, maintenance services, and remote-access capabilities. Covered equipment includes transformers, generators, inverters, RTUs, PLCs, intelligent electronic devices, and protective relays, with transmission rated 69 kV or higher in scope while local distribution is excluded. Already-installed foreign equipment may be subject to identification, isolation, monitoring, or replacement requirements, with phased compliance and pre-qualified vendor exemptions permitted.
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CosmicSting attack & defense overview
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