Activision recently announced the upgrade of the RICOCHET Anti-Cheat mechanism and developed a new algorithm to more effectively detect XIM type of hardware cheating.
XIM devices allow users to connect a mouse and keyboard to a game console and have the console mistake it for a gamepad. This means that players can gain many unfair advantages in the actual game.

Activision said that the current anti-cheat system for XIM type has been applied to the game “Call of Duty: Modern Warfare II” and “Call of Duty: War Zone 2.0”.
Activision’s official introduction to the anti-cheat system is as follows:
The “Ricochet Anti-Cheat” program is a multi-dimensional system to combat cheating, with new server-side tools, monitoring and analysis to identify cheating, an improved investigation process to eliminate cheaters, and updates to enhance account security, among other things.
Ricochet’s back-end anti-cheat security features are already available for Call of Duty®: Modern Warfare® II 2022, Call of Duty®: Vanguard and Call of Duty®: Warzone™. In addition to the server enhancements brought by Ricochet, a new PC-side kernel-level driver has been released, developed in-house for the Call of Duty series. It is available for Modern Warfare II 2022, Vanguard and Warzone.