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A visual representation of the digital Cryptocurrency, Bitcoin. A new report says the technology's security is vulnerable. Dan Kitwood/Getty Images hide caption

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Dan Kitwood/Getty Images

Business

Cryptocurrency tech is vulnerable to tampering, a DARPA analysis finds

A new analysis commissioned by DARPA quantifies how the decentralized tech that runs the currency system could be compromised.

Attempts to ban books in school districts around the country have increased in recent years. Now, some states are working on enacting laws to give politicians more power over public libraries. Rick Bowmer/AP hide caption

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Rick Bowmer/AP

Some states are changing the laws that govern community libraries

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Liz Kirkaldie says her grandson's marijuana use led to his schizophrenia diagnosis. She says she's skeptical the labels will work, "But if it helps even one person? Great." Beth LaBerge/KQED hide caption

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Beth LaBerge/KQED

California may require labels on pot products to warn of mental health risks

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Allyson Felix reacts after winning a gold medal in the Women's 4 x 400m Relay Final at the Tokyo Olympic Games in August 2021. Christian Petersen/Getty Images hide caption

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Christian Petersen/Getty Images

Allyson Felix launches a child care initiative for athlete moms

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A visual representation of the digital Cryptocurrency, Bitcoin. A new report says the technology's security is vulnerable. Dan Kitwood/Getty Images hide caption

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Dan Kitwood/Getty Images

Cryptocurrency tech is vulnerable to tampering, a DARPA analysis finds

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