METHOD FOR SIGNING DIGITAL DOCUMENTS AND VERIFYING THEREOF USING THE SIGNED ATTRIBUTES AND COMPUTER READABLE RECORD MEDIUM ON WHICH A PROGRAM THEREFOR IS RECORDED

摘要

The present invention provides an electronic signature method using an electronic signature attribute, comprising: (a) acquiring document information to prepare a certificate and a private key; (b) setting signature information of the signature data; (c) a hash of the page. Setting a value; (d) determining whether the page is the first page; (e) if the first page is the determination result of step (d), setting the total number of pages; (f) sequential information of the current page (G) determining a hash value by encoding the signature attribute; (h) determining whether or not to sign each page; (i) as a result of determining in step (h), a signature is not required for each page. In the case of encoding the signature document; (j) determining whether or not the current signed page is the last page; (k) if the determination result of step (j), if not the last page to return to step (b), Terminating the signature if it is the last page; (l) the edition of step (h) As a result, when signatures are required for each page, generating a signature value and setting the signature value item; And (m) if the result of step (d) is not the first page, the hash value for the signature text obtained when the signature document of the previous page is generated or the hash value for the signature attribute is used as part of the digital signature attribute of the current page. And setting the hash value of the page, and then proceeding to step (f).;Digital signature, signature attribute, hash, encoding