An anonymous reader writes: Hackers have targeted three Greek banks for a third time in five days, demanding a ransom from each lender of 20,000 bitcoin (€7m), according to Greek police and the country's central bank. A group calling itself the Armada Collective demanded the bitcoin ransom after staging its first attacks last Thursday, and then threatened a full collapse of the unnamed banks' websites if they refused to pay up. These initial attacks took the form of a distributed denial of service — flooding the banks' websites with requests so that they crashed under the strain. On Thursday, they succeeded in disrupting electronic transactions at all three banks for a short period, but customer information was protected, a police official said.
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