OpenSSL provides a popular (but insecure – see below!) command line interface for AES encryption:

    openssl aes-256-cbc -salt -in filename -out filename.enc

Python has support for AES in the shape of the PyCrypto package, but it only provides the tools. How to use Python/PyCrypto to decrypt files that have been encrypted using OpenSSL?

Notice
------
This question used to also concern encryption in Python using the same scheme. I have since removed that part to discourage anyone from using it. Do NOT encrypt any more data in this way, because it is NOT secure by today&#39;s standards. You should ONLY use decryption, for no other reasons than BACKWARD COMPATIBILITY, i.e. when you have no other choice. Want to encrypt? Use NaCl/libsodium if you possibly can.



How to decrypt OpenSSL AES-encrypted files in Python?

I have an app that uses 256-bit AES encryption which is not supported by Java out of the box. I know to get this to function correctly I install the JCE unlimited strength jars in the security folder. This is fine for me being the developer, I can install them.

My question is since this app will be distributed, end users most likely will not have these policy files installed. Having the end user download these just to make the app function is not an attractive solution. 

Is there a way to make my app run without overwriting files on the end user machine? A third party software that can handle it without the policy files installed? Or a way to just reference these policy files from within a JAR? 

How to avoid installing &quot;Unlimited Strength&quot; JCE policy files when deploying an application?

Does anyone have pros and cons together for comparing these encryption algorithms ?

Comparison of DES, Triple DES, AES, blowfish encryption for data

Can anybody point me in the right direction to be able to encrypt a string, returning another string with the encrypted data? (I&#39;ve been trying with AES256 encryption.) I want to write a method which takes two NSString instances, one being the message to encrypt and the other being a &#39;passcode&#39; to encrypt it with - I suspect I&#39;d have to generate the encryption key with the passcode, in a way that can be reversed if the passcode is supplied with the encrypted data. The method should then return an NSString created from the encrypted data.

I&#39;ve tried the technique detailed in [the first comment on this post][1], but I&#39;ve had no luck so far. Apple&#39;s [CryptoExercise][2] certainly has something, but I can&#39;t make sense of it... I&#39;ve seen lots of references to [CCCrypt][3], but it&#39;s failed in every case I&#39;ve used it.

I would also have to be able to decrypt an encrypted string, but I hope that&#39;s as simple as kCCEncrypt/kCCDecrypt.


  [1]: http://iphonedevelopment.blogspot.com/2009/02/strong-encryption-for-cocoa-cocoa-touch.html#comments
  [2]: https://developer.apple.com/iPhone/library/samplecode/CryptoExercise/
  [3]: http://developer.apple.com/mac/library/documentation/Darwin/Reference/ManPages/man3/CCCrypt.3cc.html

AES Encryption for an NSString on the iPhone

Is there a library available for AES 256-bits encryption in Javascript?

Javascript AES encryption

I can&#39;t seem to find a nice clean example of using AES 128 bit encryption.

Does anyone have some sample code?

Using AES encryption in C#

What&#39;s wrong with the following example?

The problem is that the first part of the decrypted string is nonsense. However, the rest is fine, I get...

&gt;     Result: `&#163;eB6O�geS��i are you? Have a nice day.

    @Test
    public void testEncrypt() {
      try {
        String s = &quot;Hello there. How are you? Have a nice day.&quot;;

        // Generate key
        KeyGenerator kgen = KeyGenerator.getInstance(&quot;AES&quot;);
        kgen.init(128);
        SecretKey aesKey = kgen.generateKey();

        // Encrypt cipher
        Cipher encryptCipher = Cipher.getInstance(&quot;AES/CBC/PKCS5Padding&quot;);
        encryptCipher.init(Cipher.ENCRYPT_MODE, aesKey);

        // Encrypt
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        CipherOutputStream cipherOutputStream = new CipherOutputStream(outputStream, encryptCipher);
        cipherOutputStream.write(s.getBytes());
        cipherOutputStream.flush();
        cipherOutputStream.close();
        byte[] encryptedBytes = outputStream.toByteArray();

        // Decrypt cipher
        Cipher decryptCipher = Cipher.getInstance(&quot;AES/CBC/PKCS5Padding&quot;);
        IvParameterSpec ivParameterSpec = new IvParameterSpec(aesKey.getEncoded());
        decryptCipher.init(Cipher.DECRYPT_MODE, aesKey, ivParameterSpec);

        // Decrypt
        outputStream = new ByteArrayOutputStream();
        ByteArrayInputStream inStream = new ByteArrayInputStream(encryptedBytes);
        CipherInputStream cipherInputStream = new CipherInputStream(inStream, decryptCipher);
        byte[] buf = new byte[1024];
        int bytesRead;
        while ((bytesRead = cipherInputStream.read(buf)) &gt;= 0) {
            outputStream.write(buf, 0, bytesRead);
        }

        System.out.println(&quot;Result: &quot; + new String(outputStream.toByteArray()));

      } 
      catch (Exception ex) {
        ex.printStackTrace();
      }
    }



Initial bytes incorrect after Java AES/CBC decryption

Which of them are preferred in which circumstances? 

I&#39;d like to see the list of evaluation crtieria for the various modes, and maybe a discussion of the applicability of each criterion. 

For example,
I think one of the criteria is &quot;size of the code&quot; for encryption and decryption, which is important for micro-code embedded systems, like 802.11 network adapters. IF the code required to implement CBC is much smaller than that required for CTR (I don&#39;t know this is true, it&#39;s just an example), then I could understand why the mode with the smaller code would be preferred.  But if I am writing an app that runs on a server, and the AES library I am using implements both CBC and CTR anyway, then this criterion is irrelevant. 

See what I mean by &quot;list of evaluation criteria and applicability of each criterion&quot; ??  

This isn&#39;t really programming related but it is algorithm related.



How to choose an AES encryption mode (CBC ECB CTR OCB CFB)?

I want to encrypt a binary file. My goal is that to prevent anyone to read the file who doesn&#39;t have the password.

Which is the better solution, AES or Blowfish with the same key length? We can assume that the attacker has great resources (softwares, knowledge, money) for cracking the file.

AES vs Blowfish for file encryption

Is there any good example of how to *encrypt and decrypt* image and other files with AES on Android?

Image encryption/decryption using AES256 symmetric block ciphers

What&#39;s the difference between SHA and AES encryption?



I want to encrypt a string using AES with my own key. But I&#39;m having trouble with the bit length of the key. Can you review my code and see what I need to fix/change.

	public static void main(String[] args) throws Exception {
		String username = &quot;bob@google.org&quot;;
		String password = &quot;Password1&quot;;
		String secretID = &quot;BlahBlahBlah&quot;;
		String SALT2 = &quot;deliciously salty&quot;;

		// Get the Key
		byte[] key = (SALT2 + username + password).getBytes();
		System.out.println((SALT2 + username + password).getBytes().length);
		
		// Need to pad key for AES
		// TODO: Best way?
		
		// Generate the secret key specs.
		SecretKeySpec secretKeySpec = new SecretKeySpec(key, &quot;AES&quot;);

		// Instantiate the cipher
		Cipher cipher = Cipher.getInstance(&quot;AES&quot;);
		cipher.init(Cipher.ENCRYPT_MODE, secretKeySpec);

		byte[] encrypted = cipher.doFinal((secrectID).getBytes());
		System.out.println(&quot;encrypted string: &quot; + asHex(encrypted));

		cipher.init(Cipher.DECRYPT_MODE, secretKeySpec);
		byte[] original = cipher.doFinal(encrypted);
		String originalString = new String(original);
		System.out.println(&quot;Original string: &quot; + originalString + &quot;\nOriginal string (Hex): &quot; + asHex(original));
	}

Right now I get an exception &quot;**Invalid AES key length: 86 bytes**&quot;. Do I need to pad my key? How should I do it?

Also do I need to set anything for ECB or CBC?

Thanks

Java AES and using my own Key

**Why I ask this question:**

I know there have been a lot of questions about AES encryption, even for Android. And there are lots of code snippets if you search the Web. But on every single page, in every Stack Overflow question, I find another implementation with major differences.

So I created this question to find a &quot;best practice&quot;. I hope we can collect a list of the most important requirements and set up an implementation that is really secure!

I read about initialization vectors and salts. Not all implementations I found had these features. So do you need it? Does it increase the security a lot? How do you implement it? Should the algorithm raise exceptions if the encrypted data cannot be decrypted? Or is that insecure and it should just return an unreadable string? Can the algorithm use Bcrypt instead of SHA?

What about these two implementations I found? Are they okay? Perfect or some important things missing? What of these is secure?

The algorithm should take a string and a &quot;password&quot; for encryption and then encrypt the string with that password. The output should be a string (hex or base64?) again. Decryption should be possible as well, of course.

**What is the perfect AES implementation for Android?**

**Implementation #1:**

	import java.security.MessageDigest;
	import java.security.NoSuchAlgorithmException;
	import java.security.NoSuchProviderException;
	import java.security.SecureRandom;

	import javax.crypto.Cipher;
	import javax.crypto.SecretKey;
	import javax.crypto.SecretKeyFactory;
	import javax.crypto.spec.IvParameterSpec;
	import javax.crypto.spec.PBEKeySpec;
	import javax.crypto.spec.SecretKeySpec;

	public class AdvancedCrypto implements ICrypto {

			public static final String PROVIDER = &quot;BC&quot;;
			public static final int SALT_LENGTH = 20;
			public static final int IV_LENGTH = 16;
			public static final int PBE_ITERATION_COUNT = 100;

			private static final String RANDOM_ALGORITHM = &quot;SHA1PRNG&quot;;
			private static final String HASH_ALGORITHM = &quot;SHA-512&quot;;
			private static final String PBE_ALGORITHM = &quot;PBEWithSHA256And256BitAES-CBC-BC&quot;;
			private static final String CIPHER_ALGORITHM = &quot;AES/CBC/PKCS5Padding&quot;;
			private static final String SECRET_KEY_ALGORITHM = &quot;AES&quot;;

			public String encrypt(SecretKey secret, String cleartext) throws CryptoException {
					try {

							byte[] iv = generateIv();
							String ivHex = HexEncoder.toHex(iv);
							IvParameterSpec ivspec = new IvParameterSpec(iv);

							Cipher encryptionCipher = Cipher.getInstance(CIPHER_ALGORITHM, PROVIDER);
							encryptionCipher.init(Cipher.ENCRYPT_MODE, secret, ivspec);
							byte[] encryptedText = encryptionCipher.doFinal(cleartext.getBytes(&quot;UTF-8&quot;));
							String encryptedHex = HexEncoder.toHex(encryptedText);

							return ivHex + encryptedHex;

					} catch (Exception e) {
							throw new CryptoException(&quot;Unable to encrypt&quot;, e);
					}
			}

			public String decrypt(SecretKey secret, String encrypted) throws CryptoException {
					try {
							Cipher decryptionCipher = Cipher.getInstance(CIPHER_ALGORITHM, PROVIDER);
							String ivHex = encrypted.substring(0, IV_LENGTH * 2);
							String encryptedHex = encrypted.substring(IV_LENGTH * 2);
							IvParameterSpec ivspec = new IvParameterSpec(HexEncoder.toByte(ivHex));
							decryptionCipher.init(Cipher.DECRYPT_MODE, secret, ivspec);
							byte[] decryptedText = decryptionCipher.doFinal(HexEncoder.toByte(encryptedHex));
							String decrypted = new String(decryptedText, &quot;UTF-8&quot;);
							return decrypted;
					} catch (Exception e) {
							throw new CryptoException(&quot;Unable to decrypt&quot;, e);
					}
			}

			public SecretKey getSecretKey(String password, String salt) throws CryptoException {
					try {
							PBEKeySpec pbeKeySpec = new PBEKeySpec(password.toCharArray(), HexEncoder.toByte(salt), PBE_ITERATION_COUNT, 256);
							SecretKeyFactory factory = SecretKeyFactory.getInstance(PBE_ALGORITHM, PROVIDER);
							SecretKey tmp = factory.generateSecret(pbeKeySpec);
							SecretKey secret = new SecretKeySpec(tmp.getEncoded(), SECRET_KEY_ALGORITHM);
							return secret;
					} catch (Exception e) {
							throw new CryptoException(&quot;Unable to get secret key&quot;, e);
					}
			}

			public String getHash(String password, String salt) throws CryptoException {
					try {
							String input = password + salt;
							MessageDigest md = MessageDigest.getInstance(HASH_ALGORITHM, PROVIDER);
							byte[] out = md.digest(input.getBytes(&quot;UTF-8&quot;));
							return HexEncoder.toHex(out);
					} catch (Exception e) {
							throw new CryptoException(&quot;Unable to get hash&quot;, e);
					}
			}

			public String generateSalt() throws CryptoException {
					try {
							SecureRandom random = SecureRandom.getInstance(RANDOM_ALGORITHM);
							byte[] salt = new byte[SALT_LENGTH];
							random.nextBytes(salt);
							String saltHex = HexEncoder.toHex(salt);
							return saltHex;
					} catch (Exception e) {
							throw new CryptoException(&quot;Unable to generate salt&quot;, e);
					}
			}

			private byte[] generateIv() throws NoSuchAlgorithmException, NoSuchProviderException {
					SecureRandom random = SecureRandom.getInstance(RANDOM_ALGORITHM);
					byte[] iv = new byte[IV_LENGTH];
					random.nextBytes(iv);
					return iv;
			}

	}

Source: [http://pocket-for-android.1047292.n5.nabble.com/Encryption-method-and-reading-the-Dropbox-backup-td4344194.html][1]

**Implementation #2:**

	import java.security.SecureRandom;

	import javax.crypto.Cipher;
	import javax.crypto.KeyGenerator;
	import javax.crypto.SecretKey;
	import javax.crypto.spec.SecretKeySpec;

	/**
	 * Usage:
	 * &lt;pre&gt;
	 * String crypto = SimpleCrypto.encrypt(masterpassword, cleartext)
	 * ...
	 * String cleartext = SimpleCrypto.decrypt(masterpassword, crypto)
	 * &lt;/pre&gt;
	 * @author ferenc.hechler
	 */
	public class SimpleCrypto {

		public static String encrypt(String seed, String cleartext) throws Exception {
			byte[] rawKey = getRawKey(seed.getBytes());
			byte[] result = encrypt(rawKey, cleartext.getBytes());
			return toHex(result);
		}
		
		public static String decrypt(String seed, String encrypted) throws Exception {
			byte[] rawKey = getRawKey(seed.getBytes());
			byte[] enc = toByte(encrypted);
			byte[] result = decrypt(rawKey, enc);
			return new String(result);
		}

		private static byte[] getRawKey(byte[] seed) throws Exception {
			KeyGenerator kgen = KeyGenerator.getInstance(&quot;AES&quot;);
			SecureRandom sr = SecureRandom.getInstance(&quot;SHA1PRNG&quot;);
			sr.setSeed(seed);
			kgen.init(128, sr); // 192 and 256 bits may not be available
			SecretKey skey = kgen.generateKey();
			byte[] raw = skey.getEncoded();
			return raw;
		}

		
		private static byte[] encrypt(byte[] raw, byte[] clear) throws Exception {
			SecretKeySpec skeySpec = new SecretKeySpec(raw, &quot;AES&quot;);
			Cipher cipher = Cipher.getInstance(&quot;AES&quot;);
			cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
			byte[] encrypted = cipher.doFinal(clear);
			return encrypted;
		}

		private static byte[] decrypt(byte[] raw, byte[] encrypted) throws Exception {
			SecretKeySpec skeySpec = new SecretKeySpec(raw, &quot;AES&quot;);
			Cipher cipher = Cipher.getInstance(&quot;AES&quot;);
			cipher.init(Cipher.DECRYPT_MODE, skeySpec);
			byte[] decrypted = cipher.doFinal(encrypted);
			return decrypted;
		}

		public static String toHex(String txt) {
			return toHex(txt.getBytes());
		}
		public static String fromHex(String hex) {
			return new String(toByte(hex));
		}
		
		public static byte[] toByte(String hexString) {
			int len = hexString.length()/2;
			byte[] result = new byte[len];
			for (int i = 0; i &lt; len; i++)
				result[i] = Integer.valueOf(hexString.substring(2*i, 2*i+2), 16).byteValue();
			return result;
		}

		public static String toHex(byte[] buf) {
			if (buf == null)
				return &quot;&quot;;
			StringBuffer result = new StringBuffer(2*buf.length);
			for (int i = 0; i &lt; buf.length; i++) {
				appendHex(result, buf[i]);
			}
			return result.toString();
		}
		private final static String HEX = &quot;0123456789ABCDEF&quot;;
		private static void appendHex(StringBuffer sb, byte b) {
			sb.append(HEX.charAt((b&gt;&gt;4)&amp;0x0f)).append(HEX.charAt(b&amp;0x0f));
		}
		
	}

Source: [http://www.tutorials-android.com/learn/How_to_encrypt_and_decrypt_strings.rhtml][2]


  [1]: http://pocket-for-android.1047292.n5.nabble.com/Encryption-method-and-reading-the-Dropbox-backup-td4344194.html
  [2]: http://www.tutorials-android.com/learn/How_to_encrypt_and_decrypt_strings.rhtml

What are best practices for using AES encryption in Android?

The application I am working on lets the user encrypt files. The files could be of any format (spreadsheet, document, presentation, etc.).

For the specified input file, I create two output files - an encrypted data file and a key file. You need both these files to obtain your original data. The key file must work only on the corresponding data file. It should not work on any other file, either from the same user or from any other user.

AES algorithm requires two different parameters for encryption, a key and an initialization vector (IV).

I see three choices for creating the key file:

1. Embed hard-coded IV within the application and save the key in the key file.
2. Embed hard-coded key within the application and save the IV in the key file.
3. Save both the key and the IV in the key file.

Note that it is the same application that is used by different customers.

It appears all three choices would achieve the same end goal. However, I would like to get your feedback on what the right approach should be.


AES Encryption - Key versus IV

I need to implement 256 bit AES encryption, but all the examples I have found online use a &quot;KeyGenerator&quot; to generate a 256 bit key, but I would like to use my own passkey. How can I create my own key? I have tried padding it out to 256 bits, but then I get an error saying that the key is too long. I do have the unlimited jurisdiction patch installed, so thats not the problem :)

Ie. The KeyGenerator looks like this ...

    // Get the KeyGenerator
    KeyGenerator kgen = KeyGenerator.getInstance(&quot;AES&quot;);
    kgen.init(128); // 192 and 256 bits may not be available

    // Generate the secret key specs.
    SecretKey skey = kgen.generateKey();
    byte[] raw = skey.getEncoded();

[Code taken from here][1]

**EDIT**

I was actually padding the password out to 256 bytes, not bits, which is too long. The following is some code I am using now that I have some more experience with this.

    byte[] key = null; // TODO
    byte[] input = null; // TODO
    byte[] output = null;
    SecretKeySpec keySpec = null;
    keySpec = new SecretKeySpec(key, &quot;AES&quot;);
    Cipher cipher = Cipher.getInstance(&quot;AES/CBC/PKCS7Padding&quot;);
    cipher.init(Cipher.ENCRYPT_MODE, keySpec);
    output = cipher.doFinal(input)

The &quot;TODO&quot; bits you need to do yourself :-)

  [1]: http://java.sun.com/developer/technicalArticles/Security/AES/AES_v1.html

Java 256-bit AES Password-Based Encryption

I would like to know the size of data after AES encryption so that I can avoid buffering my post-AES data(on disk or memory) mainly for knowing the size.

I use 128 bit AES and `javax.crypto.Cipher` and `javax.crypto.CipherInputStream` for encryption.

A few tests performed with various input sizes show that, the post encryption size calculated as below is correct:

    long size = input_Size_In_Bytes; 
    long post_AES_Size = size + (16 - (size % 16));

But I am not sure whether the above formula is applicable for all possible input sizes.

Is there a way to calculate the size of data after applying AES encryption – in advance without having to buffer the encrypted data(on disk or memory) to know its post-encryption size?

Size of data after AES/CBC and AES/ECB encryption

I&#39;m looking for some examples of how to securely store passwords and other sensitive data using node.js and mongodb.

I want everything to use a unique salt that I will store along side the hash in the mongo document.

For authentication do I have to just salt and encrypt the input and match it to a stored hash?

Should I ever need to decrypt this data and if so how should I do it?

How are the private keys, or even salting methods securely stored on the server?

I&#39;ve heard the AES and Blowfish are both good options, what should I use?

**Any examples of how to design this would be wonderfully helpful!**

Thanks!

Storing passwords with Node.js and MongoDB

I have been searching the Internet for ***good*** c++ AES code sample/tutorial that teaches the basics of the encryption technology and the use of the Library but so far I have had no luck getting decent material.

good: Easy to understand (Just the basics for on the go study).

Example of AES using Crypto++

I found an example for en/decoding strings in PHP. At first it looks very good but it wont work :-(

Does anyone know what the problem is?

    $Pass = &quot;Passwort&quot;;
    $Clear = &quot;Klartext&quot;;
    
    $crypted = fnEncrypt($Clear, $Pass);
    echo &quot;Encrypted: &quot;.$crypted.&quot;&lt;/br&gt;&quot;;
    
    $newClear = fnDecrypt($crypted, $Pass);
    echo &quot;Decrypted: &quot;.$newClear.&quot;&lt;/br&gt;&quot;;
    
    function fnEncrypt($sValue, $sSecretKey) {
    	return trim(base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, $sSecretKey, $sDecrypted, MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND))));
    }
    
    function fnDecrypt($sValue, $sSecretKey) {
    	return trim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, $sSecretKey, base64_decode($sEncrypted), MCRYPT_MODE_ECB, mcrypt_create_iv(mcrypt_get_iv_size(MCRYPT_RIJNDAEL_256, MCRYPT_MODE_ECB), MCRYPT_RAND)));
    }
    
The result is:

Encrypted: `boKRNTYYNp7AiOvY1CidqsAn9wX4ufz/D9XrpjAOPk8=`

Decrypted: `—‚(&#209;&#193;	^ y&#203;~F&#39;&#184;&#174;&#211;–&#237;	œ&#240;2&#193;_B‰&#194;—`


PHP AES encrypt / decrypt

I have a test which runs great on my development MacBook Pro, but fails to run in continuous integration TeamCity server.

The error is following:

    java.security.InvalidKeyException: Illegal key size
        at javax.crypto.Cipher.a(DashoA13*..)
        at javax.crypto.Cipher.init(DashoA13*..)
        at javax.crypto.Cipher.init(DashoA13*..)

Both development box and TeamCity uses Java 1.6 and I use BouncyCastle library for the need of special AES encryption.

The code is following:


    private byte[] aesEncryptedInfo(String info) throws UnsupportedEncodingException, IllegalBlockSizeException, BadPaddingException, InvalidKeyException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidParameterSpecException, InvalidAlgorithmParameterException, NoSuchProviderException {
        Security.addProvider(new BouncyCastleProvider());
        SecretKey secret = new SecretKeySpec(CUSTOMLONGSECRETKEY.substring(0, 32).getBytes(), &quot;AES&quot;);
        Cipher cipher = Cipher.getInstance(&quot;AES/CBC/PKCS7Padding&quot;, &quot;BC&quot;);
        cipher.init(Cipher.ENCRYPT_MODE, secret, new IvParameterSpec(VECTOR_SECRET_KEY.getBytes()));
        return cipher.doFinal(info.getBytes(&quot;UTF-8&quot;));
    }


**UPDATE**

Looks like according to the selected answer I have to modify something on my TeamCity installation and it will possibly affect some user installations - so its not a good choice I have to switch to another crypto library to do that without limitations. So probably bouncy castle will help.

**UPDATE 2**

I actually switched to use BouncyCastle to avoid this limitation. Note this only works if you use own BC classes directly, not the BC provider.

InvalidKeyException Illegal key size

If I were to AES-encrypt a file, and then ZLIB-compress it, would the compression be less efficient than if I first compressed and then encrypted?

In other words, should I compress first or encrypt first, or does it matter?

When compressing and encrypting, should I compress first, or encrypt first?

What is the recommended way of generating a secure, random AES key in Java, using the standard JDK?

In other posts, I have found this, but using a `SecretKeyFactory` might be a better idea:

&lt;!-- language: java --&gt;

    KeyGenerator keyGen = KeyGenerator.getInstance(&quot;AES&quot;);
    SecureRandom random = new SecureRandom(); // cryptograph. secure random 
    keyGen.init(random); 
    SecretKey secretKey = keyGen.generateKey();

It would be great if the answer included an explanation of why it is a good way of generating the random key. Thanks!

All Aes Solutions on Gang of Coders

Total of 22 Aes Solutions