(57) ABSTRACT A user authentication method and apparatus including deter mining
whether a password has been input; setting a first threshold value if the input password …

A user authentication method includes varying a threshold value for human body recognition
depending on the extent to which an input graphical password matches with a registered …

The present invention is a user verification method and a user verification system, in which a
password derivation pattern for each user is pre-registered into a verification server, and …

A user authentication method includes the steps of: inputting, by a user, a predetermined
password having a plurality of digits; examining whether an input password includes an …

Provided are method and apparatus for authenticating a pass word of a user terminal. The
method includes: pre-setting, by a user, a password and an identification image for …

A password verifying method includes the following steps: providing a plurality of interactive
regions in which several known password characters are arranged and shown randomly, at …

A device to authenticate a user includes a user interface unit to receive a password input; a
surrounding information detecting unit to detect surrounding information of the device; and …

A user authentication system and method using a password. A method for performing an
operation mode associated with a password in the system having a password setup …

An authentication system is provided. The authentication system includes: a storage section
that stores association information where a plurality of instructions for individual data is …

The present invention relates to user authentication for allowing use of apparatus, Systems
and services. 2. Description of the Related Art In recent years, improvement in the …