Abstract: Provided is a neck traction apparatus for providing cervical correction by stretching the neck. More particularly, the neck traction apparatus has a traction assisting device. The apparatus includes an integral skin foam (ISF) type traction assisting device is provided so as to eliminate discomfort caused by skin contact and to match personal characteristics of a user by extending the stretching length; includes a battery so as to provide portability for use; allows the battery to be physically and electrically isolated when external power is not applied so as to minimize discharging of the battery while in standby; and has a traction body of which inflation and deflation are operated in an automatic mode so as to obtain an optimal effect of the cervical correction and prevent a safety accident from occurring.

Abstract: Provided is an off-line two-factor user authentication system. The off-line two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. A plurality of pattern seed values each adapted to uniquely specify a presentation pattern in combination with a client ID, and a plurality of verification codes corresponding to respective ones of the pattern seed values, are stored in an off-line two-factor authentication client. A presentation pattern is created based on a selected one of the pattern seed values and a client ID, and an entered one-time password is verified based on a verification code corresponding to the selected pattern seed value.

Abstract: Provided is a two-actor user authentication system with a reduced risk of leakage of authentication information. The two-factor user authentication system is designed to use, as a password, a one-time-password derivation rule to be applied to certain pattern elements included in a presentation pattern at specific positions so as to create a one-time password, and further use, as a second authentication factor, information identifying a client to be used by a user. An authentication server is operable to generate a pattern seed value adapted to uniquely specify a presentation pattern in combination with a client ID, and transmit the pattern seed value to an authentication-requesting client. The authentication-requesting client is operable to create a presentation pattern based on a client ID acquired therefrom, and display the presentation pattern to allow a user to enter thereinto a one-time password based on the presentation pattern.