Encryption of Strings works, encryption of byte[] array type does not work
aes, arrays, encryption, java
Solution
What you're seeing is the result of the array's toString() method. It's not the content of the byte array. Use `java.util.Arrays.toString(array)` to display the content of the arrays.
`[B` is the type (array of bytes), and `1b10d42` is the hashCode of the array.
Problem
I am using the following LINK for encryption and tried it with Strings and it worked. However, since I am dealing with images, I needed the encryption/decryption process to happen with byte arrays. So I modified the code in that link to the following: ``` public class AESencrp { private static final String ALGO = "AES"; private static final byte[] keyValue = new byte[] { 'T', 'h', 'e', 'B', 'e', 's', 't', 'S', 'e', 'c', 'r','e', 't', 'K', 'e', 'y' }; public static byte[] encrypt(byte[] Data) throws Exception { Key key = generateKey(); Cipher c = Cipher.getInstance(ALGO); c.init(Cipher.ENCRYPT_MODE, key); byte[] encVal = c.doFinal(Data); //String encryptedValue = new BASE64Encoder().encode(encVal); return encVal; } public static byte[] decrypt(byte[] encryptedData) throws Exception { Key key = generateKey(); Cipher c = Cipher.getInstance(ALGO); c.init(Cipher.DECRYPT_MODE, key); byte[] decValue = c.doFinal(encryptedData); return decValue; } private static Key generateKey() throws Exception { Key key = new SecretKeySpec(keyValue, ALGO); return key; } ``` and the checker class is: ``` public class Checker { public static void main(String[] args) throws Exception { byte[] array = new byte[]{127,-128,0}; byte[] arrayEnc = AESencrp.encrypt(array); byte[] arrayDec = AESencrp.decrypt(arrayEnc); System.out.println("Plain Text : " + array); System.out.println("Encrypted Text : " + arrayEnc); System.out.println("Decrypted Text : " + arrayDec); } } ``` However my output is: ``` Plain Text : [B@1b10d42 Encrypted Text : [B@dd87b2 Decrypted Text : [B@1f7d134 ``` So the decrypted text is not the same as plain text. What should I do to fix this knowing that I tried the example in the original link and it worked with Strings?