FILE - In this Feb. 7, 2018 file photo, a neon sign hanging in the window of Healthy Harvest Indoor Gardening in Hillsboro, Ore., shows that the business accepts bitcoin as payment. A raft of recent cyber-security firms and governments now cite the rising trend of crypto-jacking _ in which devices are infected with invisible malicious cryptocurrency mining software that uses the computing power of victims devices to mine virtual currency _ as the main cyber security threat to businesses and consumers worldwide. (ANSA/AP Photo/Gillian Flaccus, File) [CopyrightNotice: Copyright 2018 The Associated Press. All rights reserved.]