Upon launch, Ubisoft did utilize a server-side anti-cheat mechanism known as for the game's multiplayer components (Arcade Mode). Unlike client-side software that scans your computer for cheat programs, FairFight runs on the server. It analyzes player statistics and gameplay data in real-time. If a player is landing impossible shots or moving at speeds that are statistically impossible, FairFight flags the account.
At launch, Easy Anti-Cheat (EAC) as its primary security layer to prevent memory injection and hacking in multiplayer and co-op modes. However, its presence has been a point of significant community discussion due to technical issues and its eventual removal from the PC version. The Role of Easy Anti-Cheat (EAC) far cry 5 anti cheat