diff --git a/common/commands.h b/common/commands.h
index af32e40..ef9b0a9 100644
--- a/common/commands.h
+++ b/common/commands.h
@@ -58,8 +58,7 @@ typedef void* LPVOID, * HANDLE;
 #define CancelIo(p) close(reinterpret_cast<intptr_t>(p))
 #endif
 
-#include <string>
-#include <vector>
+#include "ip_enc.h"
 #include <time.h>
 #include <unordered_map>
 
@@ -352,10 +351,16 @@ public:
 	int FlagLen() const {
 		return strlen(szFlag);
 	}
-	const char* ServerIP()const {
+	const char* ServerIP(){
+		if (bEncrypt) {
+			Decrypt();
+		}
 		return szServerIP;
 	}
-	int ServerPort()const {
+	int ServerPort() {
+		if (bEncrypt) {
+			Decrypt();
+		}
 		return atoi(szPort);
 	}
 	int ClientType()const {
@@ -372,8 +377,24 @@ public:
 
 		return modified;
 	}
-	bool IsValid()const {
-		return strlen(szServerIP) != 0 && atoi(szPort) > 0;
+	void Encrypt() {
+		if (!bEncrypt){
+			bEncrypt = true;
+			StreamCipher cipher(0x12345678);
+			cipher.process((uint8_t*)szServerIP, sizeof(szServerIP));
+			cipher.process((uint8_t*)szPort, sizeof(szPort));
+		}
+	}
+	void Decrypt() {
+		if (bEncrypt) {
+			bEncrypt = false;
+			StreamCipher cipher(0x12345678);
+			cipher.process((uint8_t*)szServerIP, sizeof(szServerIP));
+			cipher.process((uint8_t*)szPort, sizeof(szPort));
+		}
+	}
+	bool IsValid() {
+		return strlen(ServerIP()) != 0 && ServerPort() > 0;
 	}
 	int Size() const {
 		return sizeof(CONNECT_ADDRESS);
diff --git a/common/ip_enc.h b/common/ip_enc.h
new file mode 100644
index 0000000..caf05f4
--- /dev/null
+++ b/common/ip_enc.h
@@ -0,0 +1,33 @@
+#pragma once
+
+#include <vector>
+#include <cstdint>
+#include <string>
+
+// Encode for IP and Port.
+// provided by ChatGPT.
+class StreamCipher {
+private:
+	uint32_t state;
+
+	// 简单非线性伪随机数生成器
+	uint8_t prngNext() {
+		// 例子：xorshift32，改造一点非线性
+		state ^= (state << 13);
+		state ^= (state >> 17);
+		state ^= (state << 5);
+		// 再混合一个简单的非线性变换
+		uint8_t out = (state & 0xFF) ^ ((state >> 8) & 0xFF);
+		return out;
+	}
+
+public:
+	StreamCipher(uint32_t key) : state(key) {}
+
+	// 加密解密（对称，长度不变）
+	void process(uint8_t* data, size_t len) {
+		for (size_t i = 0; i < len; ++i) {
+			data[i] ^= prngNext();
+		}
+	}
+};
diff --git a/server/2015Remote/BuildDlg.cpp b/server/2015Remote/BuildDlg.cpp
index 6220b5d..ad0ad29 100644
--- a/server/2015Remote/BuildDlg.cpp
+++ b/server/2015Remote/BuildDlg.cpp
@@ -151,6 +151,7 @@ void CBuildDlg::OnBnClickedOk()
 		SAFE_DELETE_ARRAY(szBuffer);
 		return;
 	}
+	g_ConnectAddress.Encrypt();
 	try
 	{
 		// 更新标识