diff --git a/app/src/main/assets/fonts/MonoSpecial-Regular.otf b/app/src/main/assets/fonts/MonoSpecial-Regular.otf
new file mode 100644
index 0000000000..314b20f5a8
Binary files /dev/null and b/app/src/main/assets/fonts/MonoSpecial-Regular.otf differ
diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyRecordScreen.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyRecordScreen.kt
index 5a2a66b174..ba17c38ec3 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyRecordScreen.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyRecordScreen.kt
@@ -25,7 +25,6 @@ import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.dimensionResource
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.unit.dp
@@ -36,8 +35,7 @@ import org.signal.core.ui.compose.Scaffolds
 import org.signal.core.ui.compose.SignalPreview
 import org.signal.core.ui.compose.theme.SignalTheme
 import org.thoughtcrime.securesms.R
-import kotlin.random.Random
-import kotlin.random.nextInt
+import org.thoughtcrime.securesms.fonts.MonoTypeface
 import org.signal.core.ui.R as CoreUiR
 
 /**
@@ -120,7 +118,7 @@ fun MessageBackupsKeyRecordScreen(
                   letterSpacing = 1.44.sp,
                   lineHeight = 36.sp,
                   textAlign = TextAlign.Center,
-                  fontFamily = FontFamily.Monospace
+                  fontFamily = MonoTypeface.fontFamily()
                 )
             )
           }
@@ -160,7 +158,7 @@ fun MessageBackupsKeyRecordScreen(
 private fun MessageBackupsKeyRecordScreenPreview() {
   Previews.Preview {
     MessageBackupsKeyRecordScreen(
-      backupKey = (0 until 64).map { Random.nextInt(97..122).toChar() }.joinToString("")
+      backupKey = (0 until 63).map { (('A'..'Z') + ('0'..'9')).random() }.joinToString("") + "0"
     )
   }
 }
diff --git a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyVerifyScreen.kt b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyVerifyScreen.kt
index c3ad84f053..fff4f4d8cd 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyVerifyScreen.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/backup/v2/ui/subscription/MessageBackupsKeyVerifyScreen.kt
@@ -5,7 +5,6 @@
 
 package org.thoughtcrime.securesms.backup.v2.ui.subscription
 
-import android.graphics.Typeface
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
@@ -48,7 +47,6 @@ import androidx.compose.ui.platform.testTag
 import androidx.compose.ui.res.dimensionResource
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.input.KeyboardType
@@ -63,6 +61,7 @@ import org.signal.core.ui.compose.Scaffolds
 import org.signal.core.ui.compose.SignalPreview
 import org.signal.core.ui.compose.horizontalGutters
 import org.thoughtcrime.securesms.R
+import org.thoughtcrime.securesms.fonts.MonoTypeface
 import org.thoughtcrime.securesms.registrationv3.ui.restore.BackupKeyVisualTransformation
 import org.thoughtcrime.securesms.registrationv3.ui.restore.attachBackupKeyAutoFillHelper
 import org.thoughtcrime.securesms.registrationv3.ui.restore.backupKeyAutoFillHelper
@@ -141,7 +140,7 @@ fun MessageBackupsKeyVerifyScreen(
             Text(text = stringResource(id = R.string.MessageBackupsKeyVerifyScreen__backup_key))
           },
           textStyle = LocalTextStyle.current.copy(
-            fontFamily = FontFamily(typeface = Typeface.MONOSPACE),
+            fontFamily = MonoTypeface.fontFamily(),
             lineHeight = 36.sp
           ),
           keyboardOptions = KeyboardOptions(
diff --git a/app/src/main/java/org/thoughtcrime/securesms/fonts/MonoTypeface.kt b/app/src/main/java/org/thoughtcrime/securesms/fonts/MonoTypeface.kt
new file mode 100644
index 0000000000..3dda687067
--- /dev/null
+++ b/app/src/main/java/org/thoughtcrime/securesms/fonts/MonoTypeface.kt
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2025 Signal Messenger, LLC
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+package org.thoughtcrime.securesms.fonts
+
+import android.graphics.Typeface
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.text.font.FontFamily
+
+/**
+ * Special monospace font, primarily used for rendering AEPs.
+ */
+object MonoTypeface {
+  private var cached: Typeface? = null
+
+  @Composable
+  fun fontFamily(): FontFamily {
+    val context = LocalContext.current
+    return FontFamily(cached ?: Typeface.createFromAsset(context.assets, "fonts/MonoSpecial-Regular.otf").also { cached = it })
+  }
+}
diff --git a/app/src/main/java/org/thoughtcrime/securesms/registrationv3/ui/restore/EnterBackupKeyScreen.kt b/app/src/main/java/org/thoughtcrime/securesms/registrationv3/ui/restore/EnterBackupKeyScreen.kt
index 2f793d496d..4d4018481c 100644
--- a/app/src/main/java/org/thoughtcrime/securesms/registrationv3/ui/restore/EnterBackupKeyScreen.kt
+++ b/app/src/main/java/org/thoughtcrime/securesms/registrationv3/ui/restore/EnterBackupKeyScreen.kt
@@ -5,7 +5,6 @@
 
 package org.thoughtcrime.securesms.registrationv3.ui.restore
 
-import android.graphics.Typeface
 import androidx.compose.animation.AnimatedContent
 import androidx.compose.foundation.background
 import androidx.compose.foundation.layout.Arrangement
@@ -43,7 +42,6 @@ import androidx.compose.ui.layout.onGloballyPositioned
 import androidx.compose.ui.platform.LocalSoftwareKeyboardController
 import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.font.FontFamily
 import androidx.compose.ui.text.input.ImeAction
 import androidx.compose.ui.text.input.KeyboardCapitalization
 import androidx.compose.ui.text.input.KeyboardType
@@ -58,6 +56,7 @@ import org.signal.core.ui.compose.SignalPreview
 import org.signal.core.ui.compose.horizontalGutters
 import org.thoughtcrime.securesms.R
 import org.thoughtcrime.securesms.backup.v2.ui.BackupsIconColors
+import org.thoughtcrime.securesms.fonts.MonoTypeface
 import org.thoughtcrime.securesms.registrationv3.ui.shared.RegistrationScreen
 import org.whispersystems.signalservice.api.AccountEntropyPool
 
@@ -143,7 +142,7 @@ fun EnterBackupKeyScreen(
         Text(text = stringResource(id = R.string.EnterBackupKey_backup_key))
       },
       textStyle = LocalTextStyle.current.copy(
-        fontFamily = FontFamily(typeface = Typeface.MONOSPACE),
+        fontFamily = MonoTypeface.fontFamily(),
         lineHeight = 36.sp
       ),
       keyboardOptions = KeyboardOptions(
@@ -215,7 +214,7 @@ private fun AccountEntropyPoolVerification.AEPValidationError.ValidationErrorMes
 private fun EnterBackupKeyScreenPreview() {
   Previews.Preview {
     EnterBackupKeyScreen(
-      backupKey = "UY38jh2778hjjhj8lk19ga61s672jsj089r023s6a57809bap92j2yh5t326vv7t",
+      backupKey = "UY38jh2778hjjhj8lk19ga61s672jsj089r023s6a57809bap92j2yh5t326vv7t".uppercase(),
       isBackupKeyValid = true,
       inProgress = false,
       chunkLength = 4,
@@ -229,7 +228,7 @@ private fun EnterBackupKeyScreenPreview() {
 private fun EnterBackupKeyScreenErrorPreview() {
   Previews.Preview {
     EnterBackupKeyScreen(
-      backupKey = "UY38jh2778hjjhj8lk19ga61s672jsj089r023s6a57809bap92j2yh5t326vv7t",
+      backupKey = "UY38jh2778hjjhj8lk19ga61s672jsj089r023s6a57809bap92j2yh5t326vv7t".uppercase(),
       isBackupKeyValid = true,
       inProgress = false,
       chunkLength = 4,