This research was aimed at creating a graphical password by using grid tables and
comparing the f... more This research was aimed at creating a graphical password by using grid tables and comparing the factors used for creating them. This study was to investigate the effects of types of grid tables (grid tables with a reference point and without a reference point) and the method of password creation (password set by users and passwords set by a computer system) on usability and security. There were four experimental groups. A between-subject design was employed to conduct the experiment. Purposive sampling was used due to the research constraints. The current study was conducted with 60 users. Each group had 15 samples. The 4 groups comprised of a group of users creating passwords by themselves by using a grid table with a reference point, a group of users creating passwords automatically by using a grid table with a reference point, a group of users creating passwords by themselves by using a grid table without a reference point, and a group of users creating a password automatically by using a grid table without a reference point. The usability and security evaluations were determined by numbers of logging in the system, average time spent for logging in, and the success of logging in. The current study showed that the password-creation method factor affected the usability and security significantly. The passwords set by users themselves resulted in better recalls than the system-created passwords. However, the passwords created by users increased the probability of them being stolen. The factor of types of grid table contrarily did not affect the usability and security. In terms of satisfaction, the users were satisfied with the created authentication program and their satisfaction was not different among the experimental groups.
This research examined factors which affected password creation using images on a grid. The exper... more This research examined factors which affected password creation using images on a grid. The experiment was carried out with 1,069 participants, by simulating a game of recalling pictures and using a questionnaire to gather users' feedback. A mixed-model experimental design was employed in this research. There were two experimental groups. The participants were randomly assigned into a group. The participants in the first group would have to memorize and recall human images, while the participants in the second group would have to do with images of objects instead. There were two kinds of grids, including a square and a non-square form. The participants would have to remember five images which were displayed on a grid. They would have to finish 6 trials and then they were asked to answer the questionnaire. The results indicated that a factor of image types (human and object images) did not affect the number of recalled pictures on any type of grid forms. However, the results showed that a factor of different grid forms did affect the number of recalled pictures. The participants could recall more pictures displayed on the square grids than displayed on the non-square grids significantly. Interestingly, in the further analysis of a grid size of between a 4x4 square and a 5x5 square form, there was no effect of a grid-size factor on the number of recalled pictures.
This research was aimed at creating a graphical password by using grid tables and
comparing the f... more This research was aimed at creating a graphical password by using grid tables and comparing the factors used for creating them. This study was to investigate the effects of types of grid tables (grid tables with a reference point and without a reference point) and the method of password creation (password set by users and passwords set by a computer system) on usability and security. There were four experimental groups. A between-subject design was employed to conduct the experiment. Purposive sampling was used due to the research constraints. The current study was conducted with 60 users. Each group had 15 samples. The 4 groups comprised of a group of users creating passwords by themselves by using a grid table with a reference point, a group of users creating passwords automatically by using a grid table with a reference point, a group of users creating passwords by themselves by using a grid table without a reference point, and a group of users creating a password automatically by using a grid table without a reference point. The usability and security evaluations were determined by numbers of logging in the system, average time spent for logging in, and the success of logging in. The current study showed that the password-creation method factor affected the usability and security significantly. The passwords set by users themselves resulted in better recalls than the system-created passwords. However, the passwords created by users increased the probability of them being stolen. The factor of types of grid table contrarily did not affect the usability and security. In terms of satisfaction, the users were satisfied with the created authentication program and their satisfaction was not different among the experimental groups.
This research examined factors which affected password creation using images on a grid. The exper... more This research examined factors which affected password creation using images on a grid. The experiment was carried out with 1,069 participants, by simulating a game of recalling pictures and using a questionnaire to gather users' feedback. A mixed-model experimental design was employed in this research. There were two experimental groups. The participants were randomly assigned into a group. The participants in the first group would have to memorize and recall human images, while the participants in the second group would have to do with images of objects instead. There were two kinds of grids, including a square and a non-square form. The participants would have to remember five images which were displayed on a grid. They would have to finish 6 trials and then they were asked to answer the questionnaire. The results indicated that a factor of image types (human and object images) did not affect the number of recalled pictures on any type of grid forms. However, the results showed that a factor of different grid forms did affect the number of recalled pictures. The participants could recall more pictures displayed on the square grids than displayed on the non-square grids significantly. Interestingly, in the further analysis of a grid size of between a 4x4 square and a 5x5 square form, there was no effect of a grid-size factor on the number of recalled pictures.
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Papers by Kriangkrai Manochai
comparing the factors used for creating them. This study was to investigate the effects of types of
grid tables (grid tables with a reference point and without a reference point) and the method of
password creation (password set by users and passwords set by a computer system) on usability
and security. There were four experimental groups. A between-subject design was employed to
conduct the experiment. Purposive sampling was used due to the research constraints. The
current study was conducted with 60 users. Each group had 15 samples. The 4 groups comprised
of a group of users creating passwords by themselves by using a grid table with a reference point,
a group of users creating passwords automatically by using a grid table with a reference point, a
group of users creating passwords by themselves by using a grid table without a reference point,
and a group of users creating a password automatically by using a grid table without a reference
point. The usability and security evaluations were determined by numbers of logging in the
system, average time spent for logging in, and the success of logging in. The current study showed
that the password-creation method factor affected the usability and security significantly. The
passwords set by users themselves resulted in better recalls than the system-created passwords.
However, the passwords created by users increased the probability of them being stolen. The
factor of types of grid table contrarily did not affect the usability and security. In terms of
satisfaction, the users were satisfied with the created authentication program and their satisfaction
was not different among the experimental groups.
comparing the factors used for creating them. This study was to investigate the effects of types of
grid tables (grid tables with a reference point and without a reference point) and the method of
password creation (password set by users and passwords set by a computer system) on usability
and security. There were four experimental groups. A between-subject design was employed to
conduct the experiment. Purposive sampling was used due to the research constraints. The
current study was conducted with 60 users. Each group had 15 samples. The 4 groups comprised
of a group of users creating passwords by themselves by using a grid table with a reference point,
a group of users creating passwords automatically by using a grid table with a reference point, a
group of users creating passwords by themselves by using a grid table without a reference point,
and a group of users creating a password automatically by using a grid table without a reference
point. The usability and security evaluations were determined by numbers of logging in the
system, average time spent for logging in, and the success of logging in. The current study showed
that the password-creation method factor affected the usability and security significantly. The
passwords set by users themselves resulted in better recalls than the system-created passwords.
However, the passwords created by users increased the probability of them being stolen. The
factor of types of grid table contrarily did not affect the usability and security. In terms of
satisfaction, the users were satisfied with the created authentication program and their satisfaction
was not different among the experimental groups.