币界网报道：Iranian cryptocurrency exchange Nobitex reportedly suffered a $90 million hack in 2021, according to blockchain analytics firm Elliptic. The stolen funds were allegedly laundered through Tornado Cash, a privacy-focused Ethereum mixer, raising concerns about illicit financial flows. While Nobitex initially denied the breach, claiming the funds belonged to a high-net-worth individual, Elliptic's analysis suggests the exchange may have concealed the incident. The hack highlights ongoing security vulnerabilities in crypto platforms and regulatory challenges in tracking cross-border transactions involving privacy tools. Iranian exchanges like Nobitex operate in a complex environment due to U.S. sanctions, which may complicate investigations and recovery efforts. The case underscores the growing scrutiny on cryptocurrency mixers and their potential misuse by bad actors.