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PODES encryption plain vs. cipher length
 

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    <p>I am using Java to make a toy program that encrypts a message using DES encryption. The message I want to encrypt is:</p> <pre><code>String msg="This is a secret message"; </code></pre> <p>Which I convert to bytes as:</p> <pre><code>byte [] msgBytes=msg.getBytes(); </code></pre> <p>And send it to encrypt function that works as follows:</p> <pre><code>//encryption function public static String encryptMsg(byte [] msgBytes, SecretKey myDesKey) throws NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException { Cipher desCipher; // Create the cipher desCipher = Cipher.getInstance("DES/ECB/PKCS5Padding"); desCipher.init(Cipher.ENCRYPT_MODE, myDesKey); byte[] textEncrypted = desCipher.doFinal(msgBytes); // converts to base64 for easier display. byte[] base64Cipher = Base64.encode(textEncrypted); return new String(base64Cipher); } //end encryptMsg </code></pre> <p>Then, I display the cipher, the cipher and plaintext lengths and I get:</p> <pre><code>Encrypted Message: FDCU+kgWz25urbQB5HbFtqm0HqWHGlGBHlwwEatFTiI= Original msg length: 24 Encrypted msg length: 44 </code></pre> <p>Can you please clarify to me why the cipher length is 44 while the original message length is 24?</p> <p><strong>EDIT:</strong> Kindly, I need the answer with clarification. The cipher always ends with =. Could this be because of the padding? Can you explain to me why/how the cipher is resulted with this length? And always ends with =? Is my code correct or there is a mistake? I have doubts in the encoding part.</p>
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