title: Is it possible to NOT use the IV when implementing Rijndael decryption?
body: <p>I am implementing a decryption of ciphertext using Rijndael's algorithm. Unfortunately, I have not got access to the encryption of the data and have only been provided with a password (to generate the key with) and the type of algorithm.</p>
  
  <p>I do not have a salt (which seems to be ok), and I do not have the IV. Now, my question is whether I absolutely have to have the IV in order to perform decryption? I suspect the developers who wrote the encryption made no use of salt, or IV (if this is even possible).</p>
  
  <p>I have tried to set the IV to null, with no luck, and generating a Rijndael instance creates a default IV, and this is distorting the first 16 characters of my plaintext after decryption. </p>
  
  <p>Is there any way to negate the effect of the IV? Or do a need to try and get hold of what IV was used in the encryption?</p>