+ add sym enc

helper/src/main/java/com/olexyn/misp/helper/SymEnc.java

@@ -0,0 +1,29 @@
+package com.olexyn.misp.helper;
+
+import javax.crypto.Cipher;
+import javax.crypto.KeyGenerator;
+import javax.crypto.SecretKey;
+import javax.crypto.spec.SecretKeySpec;
+import java.util.Base64;
+
+public class SymEnc {
+	public static void main(String[] args) throws Exception {
+		// Step 1: Generate a symmetric AES key (alternatively, you can specify your own)
+		KeyGenerator keyGenerator = KeyGenerator.getInstance("AES");
+		keyGenerator.init(128); // Key size
+		SecretKey secretKey = keyGenerator.generateKey();
+
+		// Step 2: Create and initialize the Cipher for AES encryption
+		Cipher cipher = Cipher.getInstance("AES");
+		cipher.init(Cipher.ENCRYPT_MODE, secretKey);
+
+		// Step 3: Encrypt the string
+		String inputString = "Your String Here";
+		byte[] encryptedBytes = cipher.doFinal(inputString.getBytes());
+
+		// Convert encrypted bytes to Base64 to get a string representation
+		String encryptedString = Base64.getEncoder().encodeToString(encryptedBytes);
+
+		System.out.println("Encrypted String: " + encryptedString);
+	}
+}