Abstract or Summary:
Information security within enterprises has endured the systems and services in order to protect all the information generated. Among the tools currently adopted worldwide to comply with information security is the implementation of AAA systems, which are used to authenticate users, grant access to the network and account the events generated in the network, particularly for authentication success and failures. The latter is the interest for this journal. Hence, a research is developed in an enterprise to reveal the reasons for failures, solutions and feasibility of application which empowers the company to improve authentication systems and, consequently, information security.