diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index f82226f..5561787 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -24,18 +24,21 @@ android {
         versionCode = 27
         versionName = "5.2"
         multiDexEnabled = false
-        signingConfig = signingConfigs.getByName("testkey")
     }
 
     buildTypes {
         release {
-            project.gradle.startParameter.excludedTaskNames.add("lint")
+            //project.gradle.startParameter.excludedTaskNames.add("lint")
             isMinifyEnabled = true
             isShrinkResources = true
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            signingConfig = signingConfigs.getByName("testkey")
+        }
+        debug {
+            signingConfig = signingConfigs.getByName("testkey")
         }
     }
     compileOptions {
@@ -75,4 +78,5 @@ dependencies {
     implementation(libs.androidx.navigation.compose)
     implementation(libs.shizuku.provider)
     implementation(libs.shizuku.api)
+    implementation(libs.androidx.biometric)
 }
\ No newline at end of file
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index ea56320..9d982af 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -45,7 +45,10 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
-
+        <activity
+            android:name=".AuthActivity"
+            android:theme="@style/Theme.OwnDroid">
+        </activity>
         <receiver
             android:name=".Receiver"
             android:description="@string/app_name"
diff --git a/app/src/main/java/com/bintianqi/owndroid/Auth.kt b/app/src/main/java/com/bintianqi/owndroid/Auth.kt
new file mode 100644
index 0000000..a258b02
--- /dev/null
+++ b/app/src/main/java/com/bintianqi/owndroid/Auth.kt
@@ -0,0 +1,92 @@
+package com.bintianqi.owndroid
+
+import android.annotation.SuppressLint
+import android.content.Context
+import android.content.Intent
+import android.os.Bundle
+import android.widget.Toast
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import androidx.biometric.BiometricManager
+import androidx.biometric.BiometricPrompt
+import androidx.biometric.BiometricPrompt.AuthenticationCallback
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.material3.Button
+import androidx.compose.material3.ExperimentalMaterial3Api
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+import androidx.core.content.ContextCompat
+import androidx.core.view.WindowCompat
+import androidx.fragment.app.FragmentActivity
+import com.bintianqi.owndroid.ui.theme.OwnDroidTheme
+
+var authenticated = false
+
+class AuthActivity: FragmentActivity(){
+    @SuppressLint("UnrememberedMutableState")
+    @OptIn(ExperimentalMaterial3Api::class)
+    override fun onCreate(savedInstanceState: Bundle?) {
+        enableEdgeToEdge()
+        WindowCompat.setDecorFitsSystemWindows(window, false)
+        super.onCreate(savedInstanceState)
+        val mainActivityIntent = Intent(applicationContext, MainActivity::class.java)
+        val sharedPref = applicationContext.getSharedPreferences("data", Context.MODE_PRIVATE)
+        val callback = object: AuthenticationCallback() {
+            override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
+                super.onAuthenticationSucceeded(result)
+                authenticated = true
+                startActivity(mainActivityIntent)
+                finish()
+            }
+            override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
+                super.onAuthenticationError(errorCode, errString)
+                Toast.makeText(applicationContext, errString, Toast.LENGTH_SHORT).show()
+                /*if (errString.toString().isNotEmpty()) {
+                }*/
+            }
+        }
+        setContent {
+            val materialYou = mutableStateOf(sharedPref.getBoolean("material_you",true))
+            val blackTheme = mutableStateOf(sharedPref.getBoolean("black_theme", false))
+            OwnDroidTheme(materialYou.value, blackTheme.value) {
+                Auth(this, callback)
+            }
+        }
+    }
+}
+
+@Composable
+fun Auth(activity: FragmentActivity, callback: AuthenticationCallback) {
+    Column(
+        horizontalAlignment = Alignment.CenterHorizontally,
+        verticalArrangement = Arrangement.Center,
+        modifier = Modifier.fillMaxSize()
+    ){
+        Text(text = "Authenticate", style = MaterialTheme.typography.headlineLarge)
+        Button(
+            onClick = {
+                authWithBiometricPrompt(activity, callback)
+            }
+        ){
+            Text(text = "Start")
+        }
+    }
+}
+
+private fun authWithBiometricPrompt(activity: FragmentActivity, callback: AuthenticationCallback) {
+    val executor = ContextCompat.getMainExecutor(activity.applicationContext)
+    val biometricPrompt = BiometricPrompt(activity, executor, callback)
+    val promptInfo = BiometricPrompt.PromptInfo.Builder()
+        .setAllowedAuthenticators(BiometricManager.Authenticators.DEVICE_CREDENTIAL)
+        .setTitle("Auth")
+        .setConfirmationRequired(true)
+        .setSubtitle("Enter password")
+        .build()
+    biometricPrompt.authenticate(promptInfo)
+}
diff --git a/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt b/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt
index 1cb458c..85fbf3a 100644
--- a/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt
+++ b/app/src/main/java/com/bintianqi/owndroid/MainActivity.kt
@@ -4,6 +4,7 @@ import android.annotation.SuppressLint
 import android.app.admin.DevicePolicyManager
 import android.content.ComponentName
 import android.content.Context
+import android.content.Intent
 import android.os.Build.VERSION
 import android.os.Bundle
 import android.widget.Toast
@@ -33,6 +34,7 @@ import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.unit.dp
 import androidx.core.view.WindowCompat
+import androidx.fragment.app.FragmentActivity
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
@@ -45,9 +47,13 @@ import java.util.Locale
 
 var backToHome = false
 @ExperimentalMaterial3Api
-class MainActivity : ComponentActivity() {
+class MainActivity : FragmentActivity() {
     @SuppressLint("UnrememberedMutableState")
     override fun onCreate(savedInstanceState: Bundle?) {
+        if(!authenticated){
+            startActivity(Intent(applicationContext, AuthActivity::class.java))
+            finish()
+        }
         enableEdgeToEdge()
         WindowCompat.setDecorFitsSystemWindows(window, false)
         super.onCreate(savedInstanceState)
@@ -96,18 +102,18 @@ fun MyScaffold(materialYou:MutableState<Boolean>, blackTheme:MutableState<Boolea
         popEnterTransition = Animations.navHostPopEnterTransition,
         popExitTransition = Animations.navHostPopExitTransition
     ){
-        composable(route = "HomePage", content = { HomePage(navCtrl, pkgName)})
-        composable(route = "SystemManage", content = { SystemManage(navCtrl) })
-        composable(route = "ManagedProfile", content = {ManagedProfile(navCtrl)})
-        composable(route = "Permissions", content = { DpmPermissions(navCtrl)})
-        composable(route = "ApplicationManage", content = { ApplicationManage(navCtrl, pkgName, dialogStatus)})
-        composable(route = "UserRestriction", content = { UserRestriction(navCtrl)})
-        composable(route = "UserManage", content = { UserManage(navCtrl)})
-        composable(route = "Password", content = { Password(navCtrl)})
-        composable(route = "AppSetting", content = { AppSetting(navCtrl, materialYou, blackTheme)})
-        composable(route = "Network", content = {Network(navCtrl)})
-        composable(route = "PackageSelector"){PackageSelector(navCtrl, pkgName)}
-        composable(route = "PermissionPicker"){PermissionPicker(navCtrl)}
+        composable(route = "HomePage"){ HomePage(navCtrl, pkgName) }
+        composable(route = "SystemManage"){ SystemManage(navCtrl) }
+        composable(route = "ManagedProfile"){ ManagedProfile(navCtrl) }
+        composable(route = "Permissions"){ DpmPermissions(navCtrl) }
+        composable(route = "ApplicationManage"){ ApplicationManage(navCtrl, pkgName, dialogStatus)}
+        composable(route = "UserRestriction"){ UserRestriction(navCtrl) }
+        composable(route = "UserManage"){ UserManage(navCtrl) }
+        composable(route = "Password"){ Password(navCtrl) }
+        composable(route = "AppSetting"){ AppSetting(navCtrl, materialYou, blackTheme) }
+        composable(route = "Network"){ Network(navCtrl) }
+        composable(route = "PackageSelector"){ PackageSelector(navCtrl, pkgName) }
+        composable(route = "PermissionPicker"){ PermissionPicker(navCtrl) }
     }
     LaunchedEffect(Unit){
         val profileInited = sharedPref.getBoolean("ManagedProfileActivated",false)
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 58301ad..016e4a5 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -7,6 +7,7 @@ navigation-compose = "2.7.7"
 material3 = "1.2.1"
 accompanist-drawablepainter = "0.35.0-alpha"
 shizuku = "13.1.5"
+biometric = "1.2.0-alpha05"
 
 [libraries]
 androidx-activity-compose = { module = "androidx.activity:activity-compose", version.ref = "androidx-activity-compose" }
@@ -16,6 +17,7 @@ androidx-ui-graphics = { module = "androidx.compose.ui:ui-graphics" }
 androidx-ui = { module = "androidx.compose.ui:ui" }
 
 accompanist-drawablepainter = { module = "com.google.accompanist:accompanist-drawablepainter", version.ref = "accompanist-drawablepainter" }
+androidx-biometric = { group = "androidx.biometric", name = "biometric", version.ref = "biometric" }
 
 shizuku-provider = { module = "dev.rikka.shizuku:provider", version.ref = "shizuku" }
 shizuku-api = { module = "dev.rikka.shizuku:api", version.ref = "shizuku" }