title: How to append no. of bytes to a byte array?
body: <p>I am doing a project in 'Steganography' in which I want to encrypt the contents of file using 'Blowfish' algorithm and then want to embed the encrypted text in the image and do the reverse procedure for extracting the image.<br>
   The 'update' method from class 'Cipher' encrypts only some no. of bytes but, here I want all the bytes(encrypted contents) of the file in only one array. Same is the case with 'update' method in decryption. This array later will be passed to a method in which I embed the text in the image and extract when required.So what can be the better approach towards this problem?<br>
  Thank you.</p>