Security system and method for security certification thereof, method of generating relative character information, terminal system, and smart card

A security certification method comprising:

• generating user relative feature information from fingerprint information of a user;
• generating final variation information based on a similarity between the user relative feature information and registered relative feature information transmitted from a smart card;
• applying the final variation information to the user absolute feature information to generate modified user absolute feature information;
• and
• certifying the user as the owner of the smart card when a similarity between the modified user absolute feature information and registered absolute feature information of the smart card owner exceeds a predetermined threshold.

A method of performing security certification by a terminal system, comprising:

• generating relative fingerprint information of a user from user absolute fingerprint information of the user;
• determining a similarity between the relative fingerprint information of the user and registered relative fingerprint information of a smart card owner to generate final variation information;
• applying the final variation information to the user absolute fingerprint information to generate modified user absolute fingerprint information;
• and
• certifying the user as the owner of the smart card when a difference between the modified user absolute fingerprint information and registered absolute fingerprint information of the smart card owner exceed a predefined threshold.

A smart card comprising:

• a storage unit storing registered absolute feature information of a smart card owner and registered relative feature information, generated from the registered absolute feature information;
• and
• a sub comparison engine determining a similarity between modified user absolute feature information and the registered absolute feature information,
• wherein the modified user absolute feature information is generated by applying final variation information obtained from determining a similarity between the registered relative feature information and user relative feature information;
• and
• a certifier to certify the user as the smart card owner when the similarity between modified user absolute feature information and the registered absolute feature information exceeds a predefined threshold.