Common use printer security system using indivisual authentication, encryption and decryption, and common use printer security method using the same

The present invention relates to a personal authentication system and a public security printer, and the printer public security method using the same is applied to encryption and decryption. A first aspect of the present invention, is connected through a direct cable to perform a public printer 10 and a data transceiver, shared printer server (20) for mounting the personal authentication device 30; And a personal authentication system tag is formed in the user terminal 40 by the user operating the hold 50, the personal authentication device capable of writing data to the authentication system tag writer 40 (writer) (40a); Including, the personal identification device 30, the personal authentication to perform personal authentication of the user in possession of a personal identification system, the tag 50 by using the writing (writing) data to the personal authentication system tag 50 is a common printer security system with the personal authentication and encryption and decryption, characterized in that for storing user information in a system in possession of a tag 40 to provide the user. In the second aspect of the invention, a first step of the user terminal 40 to perform the security setting according to the user's public security printer whether input through input and output units; Authentication device lighter in the user terminal (40) (writer) (40a) performs a write (write) to the user terminal 10 receives the user information, and the secret key input by the user from the personal authentication system tag 50 a second step; A third step of the user terminal 40 transmits the user information, private key, print document data to the printer's public server 20 through the public network printer (60); Stored on a shared printer server 20 by using the secret key received from the user terminal 40 in step (S15) the database for the printed document data encryption by performing the encryption of the print document data, and a secret key and printed a fourth step of performing printing original documents destroyed by the deletion document data; And the user information stored in the common printer server 20, the personal authentication unit 30 is a personal authentication system tag 50 is recognized when personal authentication unit 30 is a personal identification system, the tag 50 according to a provided in the third a fifth step of performing the personal authentication using the user information received according to steps, and receives the secret key writing on a personal authentication system tag (50); And Public printer server 20 has a public printer 10 for the back, the decrypted print document data perform the decoding of the encrypted print document data from the personal identification device 30, the secret step (S17) the key received via the a sixth step of performing a print output for the print document data, the print request through the transmission to; Is a common printer security method is applied to individual authentication and encryption and decryption containing the providing. This makes it possible to prevent the leakage of information provides an effect to improve increase security of the relatively weak shared printer. More particularly, the present invention is a user who has not performed the print request, and prevent the deodorant print performing authentication in accordance with the primary security, even through the personal identification falsification through the primary security to find out the secret key used at the time of encryption to the existing I can not provide the documents which are not decoded for the encrypted print document data can not be seen, the contents of this publication to be printed by itself effective.