diff --git a/.vscode/settings.json b/.vscode/settings.json
index 69bc411..e02710f 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -30,7 +30,8 @@
     "cmake.configureArgs": [
         "-Wno-dev", 
         "-DCMAKE_PREFIX_PATH:STRING=C:/dev/wxwigets",
-        "-DUSE_GUI=ON"
+        "-DUSE_GUI=ON",
+        "-DUSE_TRANSM_TEST=ON"
     ],
     "cmake.options.statusBarVisibility": "visible",
     "cmake.generator": "Ninja",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 278f0c9..36e0ccd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,6 +1,6 @@
 cmake_minimum_required(VERSION 3.16)
 
-project(transm VERSION 1.4.1 LANGUAGES CXX)
+project(transm VERSION 1.4.2 LANGUAGES CXX)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
@@ -57,6 +57,11 @@ add_subdirectory(client)
 add_subdirectory(filecomplete)
 add_subdirectory(tinyaes)
 
+if (DEFINED USE_TRANSM_TEST)
+message(STATUS "USE USE_TRANSM_TEST ${USE_TRANSM_TEST}")
+add_subdirectory(test)
+endif()
+
 string(TIMESTAMP VERSION_BUILD_DATE "%Y-%m-%d %H:%M")
 execute_process(
     COMMAND git rev-parse --short HEAD
diff --git a/client/client.cpp b/client/client.cpp
index e2109db..4fe6153 100644
--- a/client/client.cpp
+++ b/client/client.cpp
@@ -338,7 +338,7 @@ bool CClient::cmd_sub_list(const std::string& param)
         return false;
     }
 
-    CMessageInfo msg_info;
+    CMessageInfo msg_info(own_id_);
     msg_info.uuid = uuid_;
     msg_info.str = msg;
 
@@ -426,7 +426,7 @@ bool CClient::cmd_upload_files(const std::string& param)
     list_file_ = "auto_list";
     std::shared_ptr<CFrameBuffer> buf = std::make_shared<CFrameBuffer>();
     buf->type_ = TYPE_REQUEST_UPDATE_LIST;
-    CMessageInfo msg_info;
+    CMessageInfo msg_info(own_id_);
     msg_info.str = handel_ret;
     serialize(msg_info, &buf->data_, buf->len_);
     buf->tid_ = clients_[index]->id;
@@ -472,7 +472,7 @@ bool CClient::down_one_file(int remote_id, const std::string& file, const std::s
     std::shared_ptr<CFrameBuffer> buf = std::make_shared<CFrameBuffer>();
     buf->type_ = TYPE_OPEN_FILE;
     buf->tid_ = client->id;
-    CMessageInfo msg_info;
+    CMessageInfo msg_info(own_id_);
     msg_info.str = file;
     serialize(msg_info, &buf->data_, buf->len_);
     if (!send_frame(buf.get())) {
@@ -649,7 +649,7 @@ bool CClient::cmd_sub_task(const std::string& param, bool is_send)
     } else {
         buf->type_ = TYPE_REQUEST_DOWN_UPDATE_LIST;
     }
-    CMessageInfo msg_info;
+    CMessageInfo msg_info(own_id_);
     msg_info.str = handel_ret;
     serialize(msg_info, &buf->data_, buf->len_);
     buf->tid_ = clients_[index]->id;
@@ -757,7 +757,7 @@ bool CClient::cmd_ls(const std::string& param)
     const auto& sr = clients_[index];
     std::shared_ptr<CFrameBuffer> buf = std::make_shared<CFrameBuffer>();
     buf->type_ = TYPE_GET_DIRFILES;
-    CMessageInfo msg_info{};
+    CMessageInfo msg_info(own_id_);
     msg_info.str = path;
     serialize(msg_info, &buf->data_, buf->len_);
     buf->tid_ = sr->id;
@@ -949,7 +949,7 @@ void CClient::get_id()
 {
     auto* bf = new CFrameBuffer();
     bf->type_ = TYPE_GET_ID;
-    CMessageInfo msg_info;
+    CMessageInfo msg_info(own_id_);
     msg_info.uuid = uuid_;
     serialize(msg_info, &bf->data_, bf->len_);
     send_frame(bf);
@@ -970,7 +970,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
     }
     case TYPE_GET_LIST: {
         clients_.clear();
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} GetList deserialize failed.", __LINE__);
             break;
@@ -1044,7 +1044,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
         break;
     }
     case TYPE_GET_DIRFILES: {
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} GetDirFiles deserialize failed.", __LINE__);
             break;
@@ -1071,7 +1071,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
         break;
     }
     case TYPE_GET_DIRFILES_FAILED: {
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} GetDirFiles deserialize failed.", __LINE__);
             break;
@@ -1080,7 +1080,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
         break;
     }
     case TYPE_GET_DIRFILES_DONE: {
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} GetDirFiles deserialize failed.", __LINE__);
             break;
@@ -1107,7 +1107,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
     }
     case TYPE_OPEN_FILE: {
         std::string keys{};
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} OpenFile deserialize failed.", __LINE__);
             break;
@@ -1172,7 +1172,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
         break;
     }
     case TYPE_REQUEST_DOWN_UPDATE_LIST: {
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} GetList deserialize failed.", __LINE__);
             break;
@@ -1194,7 +1194,7 @@ void CClient::handle_frame(CFrameBuffer* buf)
             TLOGW("Update Busy......, Ignore {}", buf->fid_);
             buf->type_ = TYPE_BUSY_UPDATE_LIST;
         } else {
-            CMessageInfo msg_info;
+            CMessageInfo msg_info(buf->fid_);
             if (!deserialize(buf->data_, buf->len_, msg_info)) {
                 TLOGE("{} GetList deserialize failed.", __LINE__);
                 break;
diff --git a/server/server.cpp b/server/server.cpp
index 98ee398..ab58001 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -135,7 +135,7 @@ void CTcpServer::trans_data(CFrameBuffer* buf)
     switch (buf->type_) {
     case TYPE_GET_LIST: {
         TLOGI("[{}] GetList.", buf->fid_);
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         get_client_list(msg_info);
         serialize(msg_info, &buf->data_, buf->len_);
         if (fcli && !send_frame(fcli->socket_, buf)) {
@@ -144,7 +144,7 @@ void CTcpServer::trans_data(CFrameBuffer* buf)
         break;
     }
     case TYPE_UP_LIST: {
-        CMessageInfo msg_info;
+        CMessageInfo msg_info(buf->fid_);
         if (!deserialize(buf->data_, buf->len_, msg_info)) {
             TLOGE("{} GetList deserialize failed.", __LINE__);
             break;
@@ -303,7 +303,7 @@ void CTcpServer::th_client(const std::shared_ptr<asio::ip::tcp::socket>& socket,
                         continue;
                     }
                     if (frame->type_ == TYPE_GET_ID) {
-                        CMessageInfo msg_info;
+                        CMessageInfo msg_info("");
                         if (!deserialize(frame->data_, frame->len_, msg_info)) {
                             TLOGE("{} GetId deserialize failed.", __LINE__);
                             delete frame;
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
new file mode 100644
index 0000000..baec64a
--- /dev/null
+++ b/test/CMakeLists.txt
@@ -0,0 +1,7 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(test LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 17)
+
+add_executable(test main.cxx)
+target_link_libraries(test PRIVATE tinyaes trans_util)
\ No newline at end of file
diff --git a/test/main.cxx b/test/main.cxx
new file mode 100644
index 0000000..2a76367
--- /dev/null
+++ b/test/main.cxx
@@ -0,0 +1,21 @@
+#include <aes.hpp>
+#include <string>
+#include <util.h>
+
+int main()
+{
+    std::string key = "sss";
+    uint8_t ik[32]{};
+    hash(key.c_str(), ik);
+
+    char* msg = new char[256]{};
+    auto len = std::snprintf(msg + 12, 256, "%s", "hello world");
+    std::cout << encrypt(ik, (uint8_t*)msg, len + 12) << std::endl;
+
+    uint8_t ik2[32]{};
+    hash(key.c_str(), ik2);
+
+    std::cout << decrypt(ik2, (uint8_t*)msg, len + 12) << std::endl;
+
+    return 0;
+}
\ No newline at end of file
diff --git a/util/CMakeLists.txt b/util/CMakeLists.txt
index 4213118..8ad138e 100644
--- a/util/CMakeLists.txt
+++ b/util/CMakeLists.txt
@@ -9,5 +9,5 @@ endif()
 
 set(SOURCES util.h util.cpp)
 add_library(trans_util STATIC ${SOURCES})
-target_link_libraries(trans_util PUBLIC ofen filecomplete)
+target_link_libraries(trans_util PUBLIC ofen filecomplete tinyaes)
 target_include_directories(trans_util PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
\ No newline at end of file
diff --git a/util/util.cpp b/util/util.cpp
index c893ff6..2a27f80 100644
--- a/util/util.cpp
+++ b/util/util.cpp
@@ -1,12 +1,14 @@
 #include "util.h"
 
+#include <aes.hpp>
 #include <cstdint>
 #include <iostream>
 #include <of_util.h>
+#include <random>
 #include <thread>
 
 CTransProtocal::CTransProtocal() = default;
-
+constexpr uint8_t kz = 12;
 CTransProtocal::~CTransProtocal() = default;
 
 /*
@@ -134,23 +136,23 @@ CFrameBuffer::~CFrameBuffer()
 void serialize(const CMessageInfo& msg_info, char** out_buf, int& len)
 {
     CMessageInfo info(msg_info);
-    info.cmd = localtou8(info.cmd);
+    info.id = localtou8(info.id);
     info.uuid = localtou8(info.uuid);
     info.str = localtou8(info.str);
     info.o = localtou8(info.o);
 
     // 计算总长度
-    len = sizeof(int) * 4 + info.cmd.size() + info.uuid.size() + info.str.size() + info.o.size();
+    len = sizeof(int) * 4 + info.id.size() + info.uuid.size() + info.str.size() + info.o.size() + kz;
     *out_buf = new char[len];   // 分配内存（调用方负责释放）
 
-    char* ptr = *out_buf;
+    char* ptr = *out_buf + kz;
 
     // 序列化 cmd
-    int cmd_size = static_cast<int>(info.cmd.size());
-    memcpy(ptr, &cmd_size, sizeof(int));
+    int id_size = static_cast<int>(info.id.size());
+    memcpy(ptr, &id_size, sizeof(int));
     ptr += sizeof(int);
-    memcpy(ptr, info.cmd.data(), cmd_size);
-    ptr += cmd_size;
+    memcpy(ptr, info.id.data(), id_size);
+    ptr += id_size;
 
     // 序列化 uuid
     int uuid_size = static_cast<int>(info.uuid.size());
@@ -171,12 +173,28 @@ void serialize(const CMessageInfo& msg_info, char** out_buf, int& len)
     memcpy(ptr, &o_size, sizeof(int));
     ptr += sizeof(int);
     memcpy(ptr, info.o.data(), o_size);
+
+    uint8_t ik[32]{};
+    hash(msg_info.id.c_str(), ik);
+    if (!encrypt(ik, (uint8_t*)(*out_buf), len)) {
+        return;
+    }
 }
 
-bool deserialize(const char* data, int len, CMessageInfo& msg_info)
+bool deserialize(char* data, int len, CMessageInfo& msg_info)
 {
-    CMessageInfo info;
-    const char* ptr = data;
+    if (len < kz) {
+        return false;
+    }
+
+    uint8_t ik[32]{};
+    hash(msg_info.id.c_str(), ik);
+    if (!decrypt(ik, (uint8_t*)(data), len)) {
+        return false;
+    }
+
+    CMessageInfo info(msg_info.id);
+    char* ptr = data + kz;
     int remaining = len;
 
     // 反序列化 cmd
@@ -184,17 +202,17 @@ bool deserialize(const char* data, int len, CMessageInfo& msg_info)
         return false;
     }
 
-    int cmd_size;
-    memcpy(&cmd_size, ptr, sizeof(int));
+    int id_size;
+    memcpy(&id_size, ptr, sizeof(int));
     ptr += sizeof(int);
     remaining -= sizeof(int);
-    if (remaining < cmd_size) {
+    if (remaining < id_size) {
         return false;
     }
 
-    info.cmd.assign(ptr, cmd_size);
-    ptr += cmd_size;
-    remaining -= cmd_size;
+    info.id.assign(ptr, id_size);
+    ptr += id_size;
+    remaining -= id_size;
 
     // 反序列化 uuid
     if (remaining < static_cast<int>(sizeof(int))) {
@@ -243,7 +261,7 @@ bool deserialize(const char* data, int len, CMessageInfo& msg_info)
     }
     info.o.assign(ptr, o_size);
 
-    info.cmd = u8tolocal(info.cmd);
+    info.id = u8tolocal(info.id);
     info.uuid = u8tolocal(info.uuid);
     info.str = u8tolocal(info.str);
     info.o = u8tolocal(info.o);
@@ -270,12 +288,65 @@ std::string localtou8(const std::string& str)
 #endif
 }
 
+void hash(const char* data, uint8_t k[32])
+{
+    uint32_t h = 5381;
+    for (const char* p = data; *p; p++) {
+        h = ((h << 5) + h) + *p;   // DJB2
+    }
+    for (int i = 0; i < 32; i++) {
+        k[i] = (h >> (i % 4 * 8)) & 0xFF;
+    }
+}
+
+void rdm(uint8_t* o, size_t size)
+{
+    std::random_device rd;
+    std::uniform_int_distribution<int> dist(0, 255);
+    std::generate(o, o + size, [&]() { return dist(rd); });
+}
+
+bool encrypt(const uint8_t* k, uint8_t* m, size_t len)
+{
+    if (len < kz) {
+        return false;
+    }
+
+    uint8_t nonce[kz]{};
+    rdm(nonce, sizeof(nonce));
+    memcpy(m, nonce, kz);
+
+    struct AES_ctx ctx;
+    AES_init_ctx_iv(&ctx, k, nonce);
+    AES_CTR_xcrypt_buffer(&ctx, m + kz, len - kz);
+    return true;
+}
+
+bool decrypt(const uint8_t* k, uint8_t* m, size_t len)
+{
+    if (len < kz) {
+        return false;
+    }
+
+    uint8_t nonce[kz]{};
+    memcpy(nonce, m, kz);
+
+    struct AES_ctx ctx;
+    AES_init_ctx_iv(&ctx, k, nonce);
+    AES_CTR_xcrypt_buffer(&ctx, m + kz, len - kz);
+    return true;
+}
+
+CMessageInfo::CMessageInfo(const std::string& id) : id(id)
+{
+}
+
 CMessageInfo::CMessageInfo(const CMessageInfo& info)
 {
     if (&info == this) {
         return;
     }
-    cmd = info.cmd;
+    id = info.id;
     uuid = info.uuid;
     str = info.str;
     o = info.o;
@@ -286,7 +357,7 @@ CMessageInfo& CMessageInfo::operator=(const CMessageInfo& info)
     if (&info == this) {
         return *this;
     }
-    cmd = info.cmd;
+    id = info.id;
     uuid = info.uuid;
     str = info.str;
     o = info.o;
diff --git a/util/util.h b/util/util.h
index a11df9a..cfdbe7d 100644
--- a/util/util.h
+++ b/util/util.h
@@ -44,19 +44,23 @@ enum FrameType : int16_t {
 
 // 此结构体成员顺序不可变动，涉及到序列化反序列化。
 struct CMessageInfo {
-    CMessageInfo() = default;
+    CMessageInfo(const std::string& id);
     CMessageInfo(const CMessageInfo& info);
     CMessageInfo& operator=(const CMessageInfo& info);
-    std::string cmd;
+    std::string id;
     std::string uuid;
     std::string str;
     std::string o;
 };
 
 void serialize(const CMessageInfo& msg_info, char** out_buf, int& len);
-bool deserialize(const char* data, int len, CMessageInfo& msg_info);
+bool deserialize(char* data, int len, CMessageInfo& msg_info);
 std::string u8tolocal(const std::string& str);
 std::string localtou8(const std::string& str);
+void hash(const char* data, uint8_t k[32]);
+void rdm(uint8_t* o, size_t size);
+bool encrypt(const uint8_t* k, uint8_t* m, size_t len);
+bool decrypt(const uint8_t* k, uint8_t* m, size_t len);
 
 using namespace ofen;
 class CFrameBuffer