Custom ROM users (Pixel Experience, LineageOS, etc.) lose Xiaomi’s Security suite entirely. Security 5.6.0 is only available on official MIUI/HyperOS builds. Security 5.6.0 vs. Google Play Protect Many users ask: "Do I still need Google Play Protect if I have Security 5.6.0?"
Most users will not notice a difference in everyday use. However, if you run a full manual scan of your device’s storage (Settings > Security > Scan), you may experience slight warmth and faster battery drain for 2–3 minutes. No discussion of Xiaomi’s security features is complete without addressing privacy concerns. Security 5.6.0 has been criticized by some privacy advocates because, by default, it enables “Usage Diagnostics” and “Security Scan Reporting.”
Think of Play Protect as the border patrol and Security 5.6.0 as the internal surveillance system. One concern with security software is system slowdown and battery drain. According to internal Xiaomi tests (and verified by independent reviewers like Notebookcheck), Security 5.6.0 consumes ~3% additional CPU resources during scanning and 1.2% more battery per full charge compared to version 5.5.0.