In brief Senator Warren sent a letter to Defense Secretary Pete Hegseth demanding answers over Grok’s Pentagon access Security agencies have warned about Grok’s risks, but the Pentagon appears to be pushing ahead anyway. Grok’s history includes lurid deepfake images of minors, antisemitic outputs, and leaked conversations. Senator Elizabeth Warren wants to know how a chatbot that allegedly generated millions of deepfake images—including compromising images depicting minors—ended up with keys to the Pentagon’s most classified systems.On Sunday, Warren sent a four-page letter to Defense Secretary Pete Hegseth demanding answers about the Department of Defense’s decision to give Elon Musk’s xAI…

Mastercard has agreed to acquire stablecoin infrastructure company BVNK in a deal valued at up to $1.8 billion, further expanding into blockchain-based payments.The deal includes up to $300 million in contingent payments and is intended to strengthen Mastercard’s ability to connect fiat payment rails with onchain transactions, the company said on Tuesday.“We expect that most financial institutions and fintechs will in time provide digital currency services, be it with stablecoins or tokenized deposits,” Jorn Lambert, chief product officer at Mastercard, said.BVNK, founded in 2021, provides infrastructure that allows businesses to send and receive payments across major blockchain networks in more…

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