The Research Of Information Countermeasures Based On The Tactical Plan Recognition

With the appearace of hackers, computer virus and information spy, computer network suffers all kinds of attack. That shows the computer system have inherent frangibility. Using intelligent information attact weapon makes other countries main computer information system disturbed. Further, make the country economy collapsed, military command system failured, decision misplayed. So, the technology on computer information system attatck and defend—Computer Information Countermeasures present.The tactical plan recognition is a new plan recognition method.It is form the Mul-hypothesis track. According to the current attact actions, it generates plan hypotheses, then with new attack action coming, generates news plan hypotheses or amends generated plan hypotheses. Lastly select the hypothesis with highest reliability to recognize goal.In information field, the recognition of attact information is very important. We only recognise the attack information to gain information superiority, then to corresponding opposition. The paper based idea, make the tactical plan recognition to information countermeasures. Also, the paper designs the information countermeasures model based on the tactical plan recognition to build up the opposition ability.The model firstly deals with the information intelligently for recognizing. In a word, the model is based on recognition course of matching, hypotheses generated, dynamic track and forecast, and it may do information countermeasures in complicated information condition.The paper also improves the tactical plan recognition. Based information countermeasure character,it puts forward a method of fuzzy estimate to plan hypothesis generated, that can do hypothesis pruning based reliability, avoiding hypothesis sets too much and increasing the speed of recognition. Furthermore, the paper constructs the extending plan library differentiate the traditional plan library. Hack attack usually comprises many steps, the attack goal of each steps is different. So extending the sub-plans of plan library make the integrated plan hypothesis of Hack, it also saves space.The information countermeasures model based on the tactical plan recognition take countermeasures on the premise of recognition, it buildups the opposition ability of the information system and safeguards the safety of the information or the information system. The model has enormous theory value and application foreground.