diff --git a/project/ble_peripheral/ble_app_bladder_patch/main.c b/project/ble_peripheral/ble_app_bladder_patch/main.c
index 5cee1ad..bf1b5b2 100644
--- a/project/ble_peripheral/ble_app_bladder_patch/main.c
+++ b/project/ble_peripheral/ble_app_bladder_patch/main.c
@@ -108,7 +108,6 @@
 #endif
 
 /* -- Crypto / command parser / debug -- */
-#include "nrf_crypto.h"         /* nRF crypto library (AES, etc.) */
 #include "parser.h"             /* Binary command parser (dr_cmd_parser) */
 #include "cmd_table.h"          /* Command table registration (cmd_table_init) */
 #include "debug_print.h"        /* Debug output macro (DBG_PRINTF) */
@@ -182,8 +181,6 @@
 #define POWER_OFF_DELAY                 3000        /* Power-off delay: 3s after LED indication */
 #define POWER_RESET_DELAY               2000        /* Reset delay: 2s */
 #define LED_NUM                         24          /* LED pin number */
-#define AES_KEY_SIZE                    16          /* AES encryption key size (128-bit) */
-#define AES_BLOCK_SIZE                  16          /* AES block size (128-bit) */
 
 /*==============================================================================
  * BLE Instances (statically allocated via SoftDevice macros)
@@ -223,10 +220,6 @@ static char * roles_str[] = {"INVALID_ROLE", "CENTRAL", "PERIPHERAL"};
  * Global Variables
  * IEC 62304 §5.5.3: all global buffers zero-initialized for deterministic startup
  *============================================================================*/
-uint8_t m_encrypted_text[AES_BLOCK_SIZE] = {0};     /* AES encryption result buffer */
-uint8_t m_encrypted_text2[AES_BLOCK_SIZE] = {0};    /* AES encryption result buffer 2 */
-uint8_t m_decrypted_text[AES_BLOCK_SIZE] = {0};     /* AES decryption result buffer */
-
 volatile uint8_t Sj_type;                     /* Command type identifier */
 bool power_off_duble_prohibit = false;        /* Power-off double prevention flag */
 volatile bool power_state = false;            /* Power state tracking */