Fuzzy timing passwords for providing easy user authentication to disable persons and their application to visible light communication

Recently, it is well known that identity authentication is one of the most important technologies in computer systems and information networks. This study focuses on a new identity authentication method, whose originality is that we admit to use “time” instead of binary bits string in passwords. In this paper we first summarize fuzzy timing passwords, which have been studied by authors and enable us to secure security in identity authentication systems and avoid constrains of users. After estimating security of fuzzy timing passwords, we secondly propose visible light fuzzy timing passwords for supporting disable persons and the visually impaired.