Artificial Intelligence

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A Coding Implementation to Simulate Practical Byzantine Fault Tolerance with Asyncio, Malicious Nodes, and Latency Analysis

In this tutorial, we implement an end-to-end Practical Byzantine Fault Tolerance (PBFT) simulator using asyncio. We model a realistic distributed network with asynchronous message passing, configurable delays, and Byzantine nodes that intentionally deviate from the protocol. By explicitly implementing the pre-prepare, prepare, and commit phases, we explore how PBFT achieves consensus under adversarial conditions while

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Amid Chaos in Mexico, False Images Stoked Fears

Online disinformation proliferated rapidly after the Mexican military killed the country’s top cartel leader, fueling fear and chaos among residents and tourists alike. Mexican officials say some A.I.-generated images and fake news reports may have been linked to criminal actors.

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Innovation on the move

The Massachusetts Bay Trans­portation Authority moves hundreds of thousands of people across Greater Boston each day—thanks to a vast system of buses, trains, and ferries that depends on coordination among thousands of employees. In this storied transit system, history runs deep: The Green Line still passes through the country’s oldest subway tunnels, built beneath the

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Using big data for good

A photogenic green-eyed Russian Blue named Petra might just be the world’s most sequenced cat. Petra was rescued from an animal shelter in Reno, Nevada, by Charlie Lieu, MBA ’05, SM ’05, a data whiz, serial entrepreneur, investor, and cofounder of Darwin’s Ark, a community science nonprofit focused on pet genetics. Since becoming Lieu’s furry

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