diff --git a/SUPPORTED_DEVICES.md b/SUPPORTED_DEVICES.md
index 7b31689a..a496e903 100644
--- a/SUPPORTED_DEVICES.md
+++ b/SUPPORTED_DEVICES.md
@@ -107,7 +107,7 @@ Most category code is pinyin abbreviation of Chinese name.
 
 | Name | Name (zh) | Code | Homebridge Service | Supported | Links |
 | ---- | ---- | ---- | ---- | ---- | ---- |
-| Alarm Host | 报警主机 | mal | | | [Documentation](https://developer.tuya.com/en/docs/iot/categorymal?id=Kaiuz33clqxaf) |
+| Alarm Host | 报警主机 | mal | Security System | ✅ | [Documentation](https://developer.tuya.com/en/docs/iot/categorymal?id=Kaiuz33clqxaf) |
 | Smart Camera | 智能摄像机 | sp | Motion Sensor<br> Doorbell | ✅ | [Documentation](https://developer.tuya.com/en/docs/iot/categorysp?id=Kaiuz35leyo12) |
 | Siren Alarm | 声光报警传感器 | sgbj | | | [Documentation](https://developer.tuya.com/en/docs/iot/categorysgbj?id=Kaiuz37tlpbnu) |
 | Gas Alarm | 燃气报警传感器 | rqbj | Leak Sensor | ✅ | [Documentation](https://developer.tuya.com/en/docs/iot/categoryrqbj?id=Kaiuz3d162ubw) |
diff --git a/package-lock.json b/package-lock.json
index fb06cdfb..fe135e96 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@0x5e/homebridge-tuya-platform",
-  "version": "1.7.0-beta.29",
+  "version": "1.7.0-beta.30",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@0x5e/homebridge-tuya-platform",
-      "version": "1.7.0-beta.29",
+      "version": "1.7.0-beta.30",
       "funding": [
         {
           "type": "paypal",
diff --git a/package.json b/package.json
index f03c75ae..03a5d60f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@0x5e/homebridge-tuya-platform",
-  "version": "1.7.0-beta.29",
+  "version": "1.7.0-beta.30",
   "description": "Fork version of official Tuya Homebridge plugin. Brings a bunch of bug fix and new device support.",
   "license": "MIT",
   "repository": {
diff --git a/src/accessory/AccessoryFactory.ts b/src/accessory/AccessoryFactory.ts
index c782a941..ea265468 100644
--- a/src/accessory/AccessoryFactory.ts
+++ b/src/accessory/AccessoryFactory.ts
@@ -37,6 +37,7 @@ import AirConditionerAccessory from './AirConditionerAccessory';
 import IRControlHubAccessory from './IRControlHubAccessory';
 import IRGenericAccessory from './IRGenericAccessory';
 import IRAirConditionerAccessory from './IRAirConditionerAccessory';
+import SecuritySystemAccessory from './SecuritySystemAccessory';
 
 
 export default class AccessoryFactory {
@@ -176,6 +177,9 @@ export default class AccessoryFactory {
       case 'jtmspro':
         handler = new LockAccessory(platform, accessory);
         break;
+      case 'mal':
+        handler = new SecuritySystemAccessory(platform, accessory);
+        break;
 
       // Other
       case 'scene':
diff --git a/src/accessory/SecuritySystemAccessory.ts b/src/accessory/SecuritySystemAccessory.ts
new file mode 100644
index 00000000..22fa5c2e
--- /dev/null
+++ b/src/accessory/SecuritySystemAccessory.ts
@@ -0,0 +1,29 @@
+import BaseAccessory from './BaseAccessory';
+import { configureSecuritySystemCurrentState, configureSecuritySystemTargetState } from './characteristic/SecuritySystemState';
+import { configureName } from './characteristic/Name';
+
+const SCHEMA_CODE = {
+  MASTER_MODE: ['master_mode'],
+  SOS_STATE: ['sos_state'],
+};
+
+export default class SecuritySystemAccessory extends BaseAccessory {
+
+  requiredSchema() {
+    return [SCHEMA_CODE.MASTER_MODE, SCHEMA_CODE.SOS_STATE];
+  }
+
+  isNightArm = false;
+
+  configureServices() {
+    const service = this.accessory.getService(this.Service.SecuritySystem)
+      || this.accessory.addService(this.Service.SecuritySystem);
+
+    configureName(this, service, this.device.name);
+
+    configureSecuritySystemCurrentState(this, service, this.getSchema(...SCHEMA_CODE.MASTER_MODE),
+      this.getSchema(...SCHEMA_CODE.SOS_STATE));
+    configureSecuritySystemTargetState(this, service, this.getSchema(...SCHEMA_CODE.MASTER_MODE),
+      this.getSchema(...SCHEMA_CODE.SOS_STATE));
+  }
+}
diff --git a/src/accessory/characteristic/SecuritySystemState.ts b/src/accessory/characteristic/SecuritySystemState.ts
new file mode 100644
index 00000000..32b62327
--- /dev/null
+++ b/src/accessory/characteristic/SecuritySystemState.ts
@@ -0,0 +1,91 @@
+import { Service } from 'homebridge';
+import { TuyaDeviceSchema } from '../../device/TuyaDevice';
+import BaseAccessory from '../BaseAccessory';
+import SecuritySystemAccessory from '../SecuritySystemAccessory';
+
+const TUYA_CODES = {
+  MASTER_MODE: {
+    ARMED: 'arm',
+    DISARMED: 'disarmed',
+    HOME: 'home',
+  },
+};
+
+function getTuyaHomebridgeMap(accessory: BaseAccessory) {
+  const tuyaHomebridgeMap = new Map();
+
+  tuyaHomebridgeMap.set(TUYA_CODES.MASTER_MODE.ARMED, accessory.Characteristic.SecuritySystemCurrentState.AWAY_ARM);
+  tuyaHomebridgeMap.set(TUYA_CODES.MASTER_MODE.DISARMED, accessory.Characteristic.SecuritySystemCurrentState.DISARMED);
+  tuyaHomebridgeMap.set(TUYA_CODES.MASTER_MODE.HOME, accessory.Characteristic.SecuritySystemCurrentState.STAY_ARM);
+  tuyaHomebridgeMap.set(accessory.Characteristic.SecuritySystemCurrentState.AWAY_ARM, TUYA_CODES.MASTER_MODE.ARMED);
+  tuyaHomebridgeMap.set(accessory.Characteristic.SecuritySystemCurrentState.DISARMED, TUYA_CODES.MASTER_MODE.DISARMED);
+  tuyaHomebridgeMap.set(accessory.Characteristic.SecuritySystemCurrentState.STAY_ARM, TUYA_CODES.MASTER_MODE.HOME);
+  tuyaHomebridgeMap.set(accessory.Characteristic.SecuritySystemCurrentState.NIGHT_ARM, TUYA_CODES.MASTER_MODE.HOME);
+
+  return tuyaHomebridgeMap;
+}
+
+export function configureSecuritySystemCurrentState(accessory: SecuritySystemAccessory, service: Service,
+  masterModeSchema?: TuyaDeviceSchema, sosStateSchema?: TuyaDeviceSchema) {
+  if (!masterModeSchema || !sosStateSchema) {
+    return;
+  }
+
+  const tuyaHomebridgeMap = getTuyaHomebridgeMap(accessory);
+
+  service.getCharacteristic(accessory.Characteristic.SecuritySystemCurrentState)
+    .onGet(() => {
+      const alarmTriggered = accessory.getStatus(sosStateSchema.code)!.value;
+
+      if (alarmTriggered) {
+        return accessory.Characteristic.SecuritySystemCurrentState.ALARM_TRIGGERED;
+      } else {
+        const currentState = accessory.getStatus(masterModeSchema.code)!.value;
+        if (currentState === TUYA_CODES.MASTER_MODE.HOME) {
+          return accessory.isNightArm ? accessory.Characteristic.SecuritySystemCurrentState.NIGHT_ARM :
+            accessory.Characteristic.SecuritySystemCurrentState.STAY_ARM;
+        }
+
+        return tuyaHomebridgeMap.get(currentState);
+      }
+    });
+}
+
+export function configureSecuritySystemTargetState(accessory: SecuritySystemAccessory, service: Service,
+  masterModeSchema?: TuyaDeviceSchema, sosStateSchema?: TuyaDeviceSchema) {
+  if (!masterModeSchema || !sosStateSchema) {
+    return;
+  }
+
+  const tuyaHomebridgeMap = getTuyaHomebridgeMap(accessory);
+
+  service.getCharacteristic(accessory.Characteristic.SecuritySystemTargetState)
+    .onGet(() => {
+      const currentState = accessory.getStatus(masterModeSchema.code)!.value;
+      if (currentState === TUYA_CODES.MASTER_MODE.HOME) {
+        return accessory.isNightArm ? accessory.Characteristic.SecuritySystemCurrentState.NIGHT_ARM :
+          accessory.Characteristic.SecuritySystemCurrentState.STAY_ARM;
+      }
+
+      return tuyaHomebridgeMap.get(currentState);
+    })
+    .onSet(value => {
+
+      const sosState = accessory.getStatus(sosStateSchema.code)?.value;
+
+      // If we received a request to disarm the alarm, we make sure sos_state is set to false
+      if (sosState && value === accessory.Characteristic.SecuritySystemTargetState.DISARM) {
+        accessory.sendCommands([{
+          code: sosStateSchema.code,
+          value: false,
+        }], true);
+      }
+
+      accessory.isNightArm = value === accessory.Characteristic.SecuritySystemTargetState.NIGHT_ARM;
+
+      accessory.sendCommands([{
+        code: masterModeSchema.code,
+        value: tuyaHomebridgeMap.get(value),
+      }], true);
+    });
+}