The NCCIC recently published Security Tip 18-002, Defending Against Illicit Cryptocurrency Mining Activity, which seeks to make aware its partners of the risks associated with cryptocurrencies and to help them avoid falling victim to cryptocurrency mining activity. This product describes crytpocurrency and cryptomining, explains the tactic of cryptojacking, and offers tips for how to protect systems and devices from this activity. These tips include checking systems privilege policies, uninstalling unused software, and creating and monitoring blacklists, among others. Cryptocurrency mining has been observed at U.S. water and wastewater utilities, where it has posed the risk of slowing down and disrupting industrial operations. NCCIC/US-CERT.