code: public byte[] decrypt(String iv, String cipherText, Encoder encoder) {
          return decrypt(encoder.decode(iv), encoder.decode(cipherText));
      }
docs: Given the iv, decrypt the provided data
  
  @param iv         initialization vector
  @param cipherText data to be decrypted
  @param encoder    encoder provided RAW or HEX
  @return byte array with the plain text