Filtering Avoidance Using Web Translation Service and its Countermeasures

Recently, damage by targeted attacks has been increasing and has also become diversified. A targeted attack is any malicious attack targeted toward a specific individual or organization. It has the characteristic that damage is likely to expand because it is hardly noticeable. Therefore, the assumed countermeasures, such early detection and damage reduction, are important factors for the prevention of targeted attacks. In this paper, we propose attack methods that are able to avoid filtering by using Web translation services, and then we propose countermeasure methods. Also, to evaluate our proposals, we surveyed other attack methods, including those used in combination, such as shortened URL services and Web archive services.