Abstract
As growth of the Internet, services on it have been playing important roles in both industries and personal activities. While such services lead us to a useful society, we cannot disregard security harm to the services by attacks through the network. We need, therefore, to produce secure services to provide the useful functionality. However, it is not so easy to make services secure, because we need to consider many concerns on security.
We describe software security technologies from the difficulty point of view of secure software development in this paper. After that, we discuss how many difficulties we can solve with the technologies to make unsolved difficulties clear, that we need to tackle for future research direction.
