Like all cryptocurrencies, the majors are digital assets that secure and verify transactions using computer science and complex mathematics, known as cryptography. Unlike traditional (‘fiat’) currencies, they are not currently issued or backed by a central authority such as a government. Instead, they run across a network of computers and are underpinned by blockchain technology – a permanent record of transactions that cannot be altered without the consensus of the network.
WASHINGTON (AP) — Federal regulators have accused a group of people of promoting a securities offering tied to digital currency that raised over $2 billion from retail investors without being properly registered.

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For 21 years, the software company Kaseya labored in relative obscurity — at least until cybercriminals exploited it in early July for a massive ransomware attack that snarled businesses around the world and escalated U.S.-Russia diplomatic tensions.