Smartphone User Authentication Mechanism using OTP based on iPIN

High in mobile internet usage, importance of smart phone which can use internet regardless time and space is getting higher. However, there is a problem of exposure on various privacy attack that includes user"s delicate information in smartphone while it provides convenience. This paper proposes user authentication mechanism that uses I-PIN based disposable password to prevent from illegal approach of the third person using user"s personal information in smartphone. The proposed mechanism prevent a trial that access to smartphone by force by creating security recognizor binding authority information after interleave four digit I-PIN information. Also, it has high safety on user privacy attack because it is issued security recognizor of smartphone by being issued security key of smartphone whenever it accesses to smartphone. Corresponding Author.