diff --git a/CMakeLists.txt b/CMakeLists.txt
index ebe169a..12b637c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -30,11 +30,11 @@ if(CONFIG_OTA_PRE_ENCRYPTED_MODE)
   )
   if(CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_ON_COMPONENT_LOCATION)
     list(APPEND embed_txt_file 
-        ${COMPONENT_DIR}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private.pem
+        ${COMPONENT_DIR}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private_rsa_3072.pem
     )
    else()
     list(APPEND embed_txt_file 
-        ${project_dir}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private.pem
+        ${project_dir}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private_rsa_3072.pem
     )
    endif() 
 else()
@@ -59,15 +59,16 @@ if(CONFIG_OTA_PRE_ENCRYPTED_MODE)
     #redefine ESP_IMG_GEN_TOOL_PATH
     set(ESP_IMG_GEN_TOOL_PATH ${CMAKE_CURRENT_LIST_DIR}/esp_encrypted_img/tools/esp_enc_img_gen.py)
 
-    #openssl genrsa -out rsa_key/private.pem 3072
+    # command for generate RSA key
+    #openssl genrsa -out rsa_key/private_rsa_3072.pem 3072
    
     if(CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_ON_COMPONENT_LOCATION)
     # for rsa_key on components project_dir
     create_esp_enc_img(${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}.bin
-      ${COMPONENT_DIR}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private.pem ${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}_secure.bin app)
+      ${COMPONENT_DIR}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private_rsa_3072.pem ${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}_secure.bin app)
     else()  
     # for rsa_key on project dir  
     create_esp_enc_img(${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}.bin
-      ${project_dir}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private.pem ${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}_secure.bin app)
+      ${project_dir}/${CONFIG_OTA_PRE_ENCRYPTED_RSA_KEY_DIRECTORY}/private_rsa_3072.pem ${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}_secure.bin app)
     endif()  
 endif()
diff --git a/rsa_key/private.pem b/rsa_key/private_rsa_3072.pem
similarity index 100%
rename from rsa_key/private.pem
rename to rsa_key/private_rsa_3072.pem
diff --git a/source/ota_ws_update_esp_preencrypted.c b/source/ota_ws_update_esp_preencrypted.c
index bc02a5c..ad964e7 100644
--- a/source/ota_ws_update_esp_preencrypted.c
+++ b/source/ota_ws_update_esp_preencrypted.c
@@ -6,16 +6,6 @@
    CONDITIONS OF ANY KIND, either express or implied.
 */
 
-/* cmake cmd
-
-create_esp_enc_img(${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}.bin
-    ${project_dir}/rsa_key/private.pem ${CMAKE_BINARY_DIR}/${CMAKE_PROJECT_NAME}_secure.bin app)
-
-key cmd
-openssl genrsa -out rsa_key/private.pem 3072
-
-*/
-
 #include "esp_ota_ops.h"
 #include "esp_flash_partitions.h"
 #include "esp_partition.h"
@@ -36,12 +26,12 @@ static pre_enc_decrypt_arg_t enc_arg = {0};    // enc arg
 
 // private key
 // may be generate cmd
-// openssl genrsa -out rsa_key/private.pem 3072
+// openssl genrsa -out rsa_key/private_rsa_3072.pem 3072
 // size - 3072 !!
 // null terminated - use EMBED_TXTFILES in cmake.txt
 
-extern const char rsa_private_pem_start[] asm("_binary_private_pem_start");
-extern const char rsa_private_pem_end[] asm("_binary_private_pem_end");
+extern const char rsa_private_pem_start[] asm("_binary_private_rsa_3072_pem_start");
+extern const char rsa_private_pem_end[] asm("_binary_private_rsa_3072_pem_end");
 
 esp_err_t start_ota_ws(void)
 {