Bitcoin mining firm Sphere 3D is suing Gryphon Digital Mining, its business partner, for losing about $500,000 worth of Bitcoin due to a spoofing attack. The firm accused Gryphon CEO Rob Chang of sending 18 Bitcoin to a fraudster who pretended to be Sphere 3D's CFO in January. A few days later, another eight Bitcoin were transferred using the same method, according to a Saturday press release.... Read More: Bitcoin Mining Firm Sphere 3D Sues Gryphon Digital Over Spoofing Attack – Here's What Happened