diff --git a/app/src/main/java/io/legado/app/help/config/LocalConfig.kt b/app/src/main/java/io/legado/app/help/config/LocalConfig.kt
index 3981acaf3..078fa0041 100644
--- a/app/src/main/java/io/legado/app/help/config/LocalConfig.kt
+++ b/app/src/main/java/io/legado/app/help/config/LocalConfig.kt
@@ -6,12 +6,22 @@ import androidx.core.content.edit
 import io.legado.app.utils.getBoolean
 import io.legado.app.utils.putBoolean
 import io.legado.app.utils.putLong
+import io.legado.app.utils.putString
 import splitties.init.appCtx
 
 object LocalConfig :
     SharedPreferences by appCtx.getSharedPreferences("local", Context.MODE_PRIVATE) {
     private const val versionCodeKey = "appVersionCode"
 
+    /**
+     * 本地密码,用来对需要备份的敏感信息加密,如 webdav 配置等
+     */
+    var password: String
+        get() = getString("password", "") ?: ""
+        set(value) {
+            putString("password", value)
+        }
+
     var lastBackup: Long
         get() = getLong("lastBackup", 0)
         set(value) {
diff --git a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
index 2a471f983..9c38a6ab9 100644
--- a/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
+++ b/app/src/main/java/io/legado/app/ui/main/MainActivity.kt
@@ -23,6 +23,7 @@ import io.legado.app.constant.AppConst.appInfo
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
 import io.legado.app.databinding.ActivityMainBinding
+import io.legado.app.databinding.DialogEditTextBinding
 import io.legado.app.help.AppWebDav
 import io.legado.app.help.book.BookHelp
 import io.legado.app.help.config.AppConfig
@@ -103,6 +104,8 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
             if (!privacyPolicy()) return@launch
             //版本更新
             upVersion()
+            //设置本地密码
+            setLocalPassword()
             //备份同步
             backupSync()
             //自动更新书籍
@@ -181,7 +184,7 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
      */
     private suspend fun upVersion() = suspendCoroutine { block ->
         if (LocalConfig.versionCode == appInfo.versionCode) {
-            block.resume(Unit)
+            block.resume(null)
             return@suspendCoroutine
         }
         LocalConfig.versionCode = appInfo.versionCode
@@ -189,18 +192,43 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
             val help = String(assets.open("help/appHelp.md").readBytes())
             val dialog = TextDialog(getString(R.string.help), help, TextDialog.Mode.MD)
             dialog.setOnDismissListener {
-                block.resume(Unit)
+                block.resume(null)
             }
             showDialogFragment(dialog)
         } else if (!BuildConfig.DEBUG) {
             val log = String(assets.open("updateLog.md").readBytes())
             val dialog = TextDialog(getString(R.string.update_log), log, TextDialog.Mode.MD)
             dialog.setOnDismissListener {
-                block.resume(Unit)
+                block.resume(null)
             }
             showDialogFragment(dialog)
         } else {
-            block.resume(Unit)
+            block.resume(null)
+        }
+    }
+
+    /**
+     * 设置本地密码
+     */
+    private suspend fun setLocalPassword() = suspendCoroutine { block ->
+        if (LocalConfig.password.isNotBlank()) {
+            block.resume(null)
+            return@suspendCoroutine
+        }
+        alert(R.string.set_local_password, R.string.set_local_password_summary) {
+            val editTextBinding = DialogEditTextBinding.inflate(layoutInflater).apply {
+                editView.hint = "password"
+            }
+            customView {
+                editTextBinding.root
+            }
+            onDismiss {
+                block.resume(null)
+            }
+            okButton {
+                LocalConfig.password = editTextBinding.editView.text.toString()
+            }
+            cancelButton()
         }
     }
 
diff --git a/app/src/main/res/values-es-rES/strings.xml b/app/src/main/res/values-es-rES/strings.xml
index da1b8ed38..7df6e0f14 100644
--- a/app/src/main/res/values-es-rES/strings.xml
+++ b/app/src/main/res/values-es-rES/strings.xml
@@ -1094,4 +1094,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>
diff --git a/app/src/main/res/values-ja-rJP/strings.xml b/app/src/main/res/values-ja-rJP/strings.xml
index 27c5ea43d..6123a206b 100644
--- a/app/src/main/res/values-ja-rJP/strings.xml
+++ b/app/src/main/res/values-ja-rJP/strings.xml
@@ -1097,4 +1097,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>
diff --git a/app/src/main/res/values-pt-rBR/strings.xml b/app/src/main/res/values-pt-rBR/strings.xml
index cdcfed3c0..2441133c3 100644
--- a/app/src/main/res/values-pt-rBR/strings.xml
+++ b/app/src/main/res/values-pt-rBR/strings.xml
@@ -1097,4 +1097,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rHK/strings.xml b/app/src/main/res/values-zh-rHK/strings.xml
index 599d6fb7f..051a3b5ff 100644
--- a/app/src/main/res/values-zh-rHK/strings.xml
+++ b/app/src/main/res/values-zh-rHK/strings.xml
@@ -1094,4 +1094,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>
diff --git a/app/src/main/res/values-zh-rTW/strings.xml b/app/src/main/res/values-zh-rTW/strings.xml
index 3086b5ee0..f28559249 100644
--- a/app/src/main/res/values-zh-rTW/strings.xml
+++ b/app/src/main/res/values-zh-rTW/strings.xml
@@ -1096,4 +1096,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>
diff --git a/app/src/main/res/values-zh/strings.xml b/app/src/main/res/values-zh/strings.xml
index f84b1d662..f01f24730 100644
--- a/app/src/main/res/values-zh/strings.xml
+++ b/app/src/main/res/values-zh/strings.xml
@@ -1096,4 +1096,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index fc058abe5..4f76c089f 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -1097,4 +1097,6 @@
     <string name="text_underline">文字下划线</string>
     <string name="select_new_source">选中新增源</string>
     <string name="select_update_source">选中更新源</string>
+    <string name="set_local_password">设置本地密码</string>
+    <string name="set_local_password_summary">本地密码用来对备份的敏感信息加密和解密,如需在不同设备之间同步,本地密码需一致.</string>
 </resources>