---
name: 作弊检测模式
description: 作弊类型识别和防护方法
version: 1.0.0
---

# Cheat Detection Patterns

## Common Cheat Types

### 1. Memory Editing
Detection: CRC32/MD5 checksums on critical data
```cpp
struct PlayerData {
    int health;
    int ammo;
    uint32_t checksum;

    void UpdateChecksum() {
        checksum = CalculateCRC32(&health, offsetof(PlayerData, checksum));
    }

    bool Validate() {
        uint32_t expected = CalculateCRC32(&health, offsetof(PlayerData, checksum));
        return expected == checksum;
    }
};
```

### 2. Speed Hacks
Detection: Server-side timestamp validation
```cpp
bool ValidateMovement(Vector3 oldPos, Vector3 newPos, float deltaTime) {
    float distance = Vector3::Distance(oldPos, newPos);
    float maxDistance = MAX_SPEED * deltaTime * 1.1f; // 10% tolerance
    return distance <= maxDistance;
}
```

### 3. Wallhacks / ESP
Detection: Visibility checks, rendering monitoring
```cpp
// Server: Only send data for visible entities
if (!IsVisibleFrom(player.position, entity.position)) {
    continue; // Don't send this entity to client
}
```

### 4. Aimbot
Detection: Statistical analysis
```cpp
struct AimStats {
    int headshots;
    int totalShots;
    float avgReactionTime;

    bool IsSuspicious() {
        float headshotRatio = (float)headshots / totalShots;
        return headshotRatio > 0.7f || avgReactionTime < 50.0f; // ms
    }
};
```

## Defense Layers
1. Client-side: Basic checks (easily bypassed)
2. Driver-level: Memory protection, process monitoring
3. Server-side: Authoritative game state
4. Behavioral: ML-based anomaly detection