diff --git a/README.md b/README.md
index 49a97dc..f9f6aa4 100644
--- a/README.md
+++ b/README.md
@@ -42,6 +42,7 @@
 * `android.permission.ACCESS_MEDIA_LOCATION` to backup original media files e.g. without stripped EXIF metadata.
 * `android.permission.FOREGROUND_SERVICE` to do periodic storage backups without interruption.
 * `android.permission.MANAGE_DOCUMENTS` to retrieve the available storage roots (optional) for better UX.
+* `android.permission.USE_BIOMETRIC` to authenticate saving a new recovery code
 
 ## Contributing
 Bug reports and pull requests are welcome on GitHub at https://github.com/seedvault-app/seedvault.
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index c8a8da5..d3fa718 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -47,6 +47,9 @@
         android:name="android.permission.QUERY_ALL_PACKAGES"
         tools:ignore="QueryAllPackagesPermission" />
 
+    <!-- Used to authenticate saving a new recovery code -->
+    <uses-permission android:name="android.permission.USE_BIOMETRIC" />
+
     <application
         android:name=".App"
         android:allowBackup="false"
diff --git a/app/src/main/java/com/stevesoltys/seedvault/ui/recoverycode/RecoveryCodeInputFragment.kt b/app/src/main/java/com/stevesoltys/seedvault/ui/recoverycode/RecoveryCodeInputFragment.kt
index 8211a01..8cb7fd8 100644
--- a/app/src/main/java/com/stevesoltys/seedvault/ui/recoverycode/RecoveryCodeInputFragment.kt
+++ b/app/src/main/java/com/stevesoltys/seedvault/ui/recoverycode/RecoveryCodeInputFragment.kt
@@ -1,8 +1,14 @@
 package com.stevesoltys.seedvault.ui.recoverycode
 
 import android.app.Activity.RESULT_OK
+import android.app.KeyguardManager
 import android.content.Intent
+import android.hardware.biometrics.BiometricManager.Authenticators.BIOMETRIC_STRONG
+import android.hardware.biometrics.BiometricManager.Authenticators.DEVICE_CREDENTIAL
+import android.hardware.biometrics.BiometricPrompt
+import android.os.Build.VERSION.SDK_INT
 import android.os.Bundle
+import android.os.CancellationSignal
 import android.view.LayoutInflater
 import android.view.View
 import android.view.View.GONE
@@ -16,8 +22,10 @@
 import android.widget.Toast
 import android.widget.Toast.LENGTH_LONG
 import androidx.activity.result.contract.ActivityResultContracts.StartActivityForResult
+import androidx.annotation.RequiresApi
 import androidx.appcompat.app.AlertDialog
 import androidx.constraintlayout.widget.ConstraintLayout
+import androidx.core.content.ContextCompat.getMainExecutor
 import androidx.fragment.app.Fragment
 import cash.z.ecc.android.bip39.Mnemonics
 import cash.z.ecc.android.bip39.Mnemonics.ChecksumException
@@ -143,12 +151,36 @@
             return
         }
         if (forStoringNewCode) {
-            viewModel.storeNewCode(input)
+            val keyguardManager = requireContext().getSystemService(KeyguardManager::class.java)
+            if (SDK_INT >= 30 && keyguardManager.isDeviceSecure) {
+                // if we have a lock-screen secret, we can ask for it before storing the code
+                storeNewCodeAfterAuth(input)
+            } else {
+                // user doesn't seem to care about security, store key without auth
+                viewModel.storeNewCode(input)
+            }
         } else {
             viewModel.verifyExistingCode(input)
         }
     }
 
+    @RequiresApi(30)
+    private fun storeNewCodeAfterAuth(input: List<CharSequence>) {
+        val biometricPrompt = BiometricPrompt.Builder(context)
+            .setConfirmationRequired(true)
+            .setTitle(getString(R.string.recovery_code_auth_title))
+            .setDescription(getString(R.string.recovery_code_auth_description))
+            // BIOMETRIC_STRONG could be made optional in the future, setting guarded by credentials
+            .setAllowedAuthenticators(DEVICE_CREDENTIAL or BIOMETRIC_STRONG)
+            .build()
+        val callback = object : BiometricPrompt.AuthenticationCallback() {
+            override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult?) {
+                viewModel.storeNewCode(input)
+            }
+        }
+        biometricPrompt.authenticate(CancellationSignal(), getMainExecutor(context), callback)
+    }
+
     private fun allFilledOut(input: List<CharSequence>): Boolean {
         for (i in input.indices) {
             if (input[i].isNotEmpty()) continue
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 7682402..046ee7a 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -94,6 +94,8 @@
     <string name="recovery_code_verification_new_dialog_title">Wait one second…</string>
     <string name="recovery_code_verification_new_dialog_message">Generating a new code will make your existing backups inaccessible. We\'ll try to delete them if possible.\n\nAre you sure you want to do this?</string>
     <string name="recovery_code_recreated">New recovery code has been created successfully</string>
+    <string name="recovery_code_auth_title">Confirm it\'s really you</string>
+    <string name="recovery_code_auth_description">This ensures that nobody else can get your data when finding your phone unlocked.</string>
 
     <!-- Notification -->
     <string name="notification_channel_title">Backup notification</string>