diff --git a/WebContent/jsp/onl/apim/approval/prodclient/clientManDetail.jsp b/WebContent/jsp/onl/apim/approval/prodclient/clientManDetail.jsp
index 566b37c..bd70f6b 100644
--- a/WebContent/jsp/onl/apim/approval/prodclient/clientManDetail.jsp
+++ b/WebContent/jsp/onl/apim/approval/prodclient/clientManDetail.jsp
@@ -305,8 +305,10 @@
         function generateString(length) {
             let result = '';
             const charactersLength = characters.length;
+            const randomValues = new Uint32Array(length);
+            window.crypto.getRandomValues(randomValues);
             for (let i = 0; i < length; i++) {
-                result += characters.charAt(Math.floor(Math.random() * charactersLength));
+                result += characters.charAt(randomValues[i] % charactersLength);
             }
             return result;
         }