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The cast of characters behind the attacks, or their motives, are unclear. However, the onslaughts come at a time when the bitcoin price hits new highs, possibly triggering efforts on the part of cybercriminals to manipulate and cash in on the price.
Simple DoS attacks, which are a one-on-one affair, have been all but supplanted by DDoS attacks. The latter involve concerted campaigns from armies of devices conscripted into botnets which, as if lined up and marching in lockstep, aim to knock the unlucky target offline.