diff --git a/flutter/lib/common/widgets/peer_tab_page.dart b/flutter/lib/common/widgets/peer_tab_page.dart
index 56b5bc72c..f2de21dc7 100644
--- a/flutter/lib/common/widgets/peer_tab_page.dart
+++ b/flutter/lib/common/widgets/peer_tab_page.dart
@@ -309,6 +309,7 @@ class _PeerTabPageState extends State<PeerTabPage>
                 break;
             }
             gFFI.peerTabModel.closeSelection();
+            showToast(translate('Successful'));
           }
 
           deletePeerConfirmDialog(onSubmit);
@@ -334,6 +335,7 @@ class _PeerTabPageState extends State<PeerTabPage>
           }
           await bind.mainStoreFav(favs: favs);
           gFFI.peerTabModel.closeSelection();
+          showToast(translate('Successful'));
         },
         child: Tooltip(
                 message: translate('Add to Favorites'),
@@ -354,6 +356,7 @@ class _PeerTabPageState extends State<PeerTabPage>
           gFFI.abModel.addPeers(peers);
           gFFI.abModel.pushAb();
           gFFI.peerTabModel.closeSelection();
+          showToast(translate('Successful'));
         },
         child: Tooltip(
                 message: translate('Add to Address Book'),
@@ -377,6 +380,7 @@ class _PeerTabPageState extends State<PeerTabPage>
                       peers.map((p) => p.id).toList(), selectedTags);
                   gFFI.abModel.pushAb();
                   gFFI.peerTabModel.closeSelection();
+                  showToast(translate('Successful'));
                 });
               },
               child: Tooltip(
diff --git a/flutter/lib/models/ab_model.dart b/flutter/lib/models/ab_model.dart
index 9d24de94c..5bbbc0f9f 100644
--- a/flutter/lib/models/ab_model.dart
+++ b/flutter/lib/models/ab_model.dart
@@ -61,7 +61,7 @@ class AbModel {
       authHeaders['Accept-Encoding'] = "gzip";
       final resp = await http.get(Uri.parse(api), headers: authHeaders);
       if (resp.body.isNotEmpty && resp.body.toLowerCase() != "null") {
-        Map<String, dynamic> json = jsonDecode(resp.body);
+        Map<String, dynamic> json = jsonDecode(utf8.decode(resp.bodyBytes));
         if (json.containsKey('error')) {
           abError.value = json['error'];
         } else if (json.containsKey('data')) {
diff --git a/libs/hbb_common/src/config.rs b/libs/hbb_common/src/config.rs
index 8a801b42a..56ffa9a01 100644
--- a/libs/hbb_common/src/config.rs
+++ b/libs/hbb_common/src/config.rs
@@ -23,7 +23,7 @@ use crate::{
     log,
     password_security::{
         decrypt_str_or_original, decrypt_vec_or_original, encrypt_str_or_original,
-        encrypt_vec_or_original,
+        encrypt_vec_or_original, symmetric_crypt,
     },
 };
 
@@ -1504,13 +1504,14 @@ impl Ab {
     pub fn store(json: String) {
         if let Ok(mut file) = std::fs::File::create(Self::path()) {
             let data = compress(json.as_bytes());
-            let max_len = 32 * 1024 * 1024;
+            let max_len = 64 * 1024 * 1024;
             if data.len() > max_len {
-                // not store original
+                // maxlen of function decompress
                 return;
             }
-            let data = encrypt_vec_or_original(&data, PASSWORD_ENC_VERSION, max_len);
-            file.write_all(&data).ok();
+            if let Ok(data) = symmetric_crypt(&data, true) {
+                file.write_all(&data).ok();
+            }
         };
     }
 
@@ -1518,8 +1519,7 @@ impl Ab {
         if let Ok(mut file) = std::fs::File::open(Self::path()) {
             let mut data = vec![];
             if file.read_to_end(&mut data).is_ok() {
-                let (data, succ, _) = decrypt_vec_or_original(&data, PASSWORD_ENC_VERSION);
-                if succ {
+                if let Ok(data) = symmetric_crypt(&data, false) {
                     let data = decompress(&data);
                     if let Ok(ab) = serde_json::from_str::<Ab>(&String::from_utf8_lossy(&data)) {
                         return ab;
@@ -1527,6 +1527,7 @@ impl Ab {
                 }
             }
         };
+        Self::remove();
         Ab::default()
     }
 
diff --git a/libs/hbb_common/src/password_security.rs b/libs/hbb_common/src/password_security.rs
index a127ccd2b..28b32e68e 100644
--- a/libs/hbb_common/src/password_security.rs
+++ b/libs/hbb_common/src/password_security.rs
@@ -164,7 +164,7 @@ fn decrypt(v: &[u8]) -> Result<Vec<u8>, ()> {
     }
 }
 
-fn symmetric_crypt(data: &[u8], encrypt: bool) -> Result<Vec<u8>, ()> {
+pub fn symmetric_crypt(data: &[u8], encrypt: bool) -> Result<Vec<u8>, ()> {
     use sodiumoxide::crypto::secretbox;
     use std::convert::TryInto;