Review

class PassportService {
   /**
    * Reads the security object.
    * 
    * @return the security object data
    * 
    * @throws IOException
    */
   public byte[] readSecurityObject() throws IOException {
      byte[] tag = { 0x77 };
      BERTLVObject object = readObject(PassportFileService.EF_SOD, tag);
      return object.getValueAsBytes(); // TODO: do something with this
   }

}