보안 강화: 랜덤 문자열 생성 방식 개선 및 비밀번호 입력 필드에 autocomplete 속성 추가

src/main/java/com/eactive/eai/rms/onl/apim/approval/RandomStringGenerator.java

@@ -1,14 +1,17 @@
 package com.eactive.eai.rms.onl.apim.approval;
 
+import java.security.SecureRandom;
+
 public class RandomStringGenerator {
     private static final String CHARACTERS = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+    private static final SecureRandom SECURE_RANDOM = new SecureRandom();
 
     public static String generateString(int length) {
         StringBuilder result = new StringBuilder(length);
         int charactersLength = CHARACTERS.length();
 
         for (int i = 0; i < length; i++) {
-            int randomIndex = (int) (Math.random() * charactersLength);
+            int randomIndex = SECURE_RANDOM.nextInt(charactersLength);
             result.append(CHARACTERS.charAt(randomIndex));
         }