Jack Dorsey, co-founder and chief executive officer of Twitter Inc. and Square Inc., listens during the Bitcoin 2021 conference in Miami, Florida, U.S., on Friday, June 4, 2021.

Jack Dorsey says his ‘secure’ new Bitchat app has not been tested for security

On Sunday, Block CEO and Twitter co-founder Jack Dorsey launched an open source chat app called Bitchat, promising to deliver “secure” and “private” messaging without a centralized infrastructure. The app relies on Bluetooth and end-to-end encryption, unlike traditional messaging apps that rely on the internet. By being decentralized, Bitchat has potential for being a secure…

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Encrypted messaging apps promise privacy. Government transparency is often the price

As a devastating wildfire burned through a Maui town, killing more than 100 people, emergency management employees traded dozens of text messages, creating a record that would later help investigators piece together the government’s response to the 2023 tragedy. One text exchange hinted officials might also be using a second, untraceable messaging service. “That’s what…

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Scientists in China achieve ‘invisibility’ in chameleon-like colour breakthrough

Scientists in China achieve ‘invisibility’ in chameleon-like colour breakthrough

Chinese researchers say they have developed a material that changes colour at a molecular level based on the surrounding light, creating a new form of camouflage that could help people blend into their environments – much like a chameleon. “In other words, applying this technology to clothing could make an individual effectively ‘invisible’,” said lead…

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