Appeal No. 2003-2165 Page 11
Application No. 09/067,093
It is necessary that a ticket publisher signs the ticket information data 610
electronically for prevention of forgery. As a method for electronic
signature, an asymmetrical encryption algorithm is used. Each ticket
publisher retains a secret key STk which varies with a ticket publisher and
a public key PTk corresponding to it. For electronic signature, the whole
or a part of the ticket information data 610 is encrypted by the secret key
STk beforehand. To produce an electronic signature using a part of the
ticket information data 610, it is desirable to acquire a part of the original
data using the hash function and then encrypt STk. In the electronic ticket
storage area 32 of the electronic ticket storage device 2, the ticket
information data 610 and the electronic signature are stored. The
constitution of ticket storage data 620 in the electronic ticket storage area
32 is shown in FIG. 10. The ticket storage data 620 comprises a ticket
number, an unencrypted ticket information data 610, an electronic
signature, and an invalid flag. As an alternative idea, like ticket storage
data 640 having the constitution shown in FIG. 11, it is possible to store
data which is obtained by encrypting the whole of the ticket information
data 610 by the secret key STk and a public key PTk which forms a
counterpart to the secret key STk in the electronic ticket storage area 32.
Hereinafter, in the case of the ticket data shown in FIG. 10, a combination
of the ticket information data 610 and an electronic signature is called an
electronic ticket and in the case of the ticket data shown in FIG. 11, the
ticket information data 610 which is encrypted entirely and signed
electronically is called an electronic ticket.
Id. at ll. 38-67.
The second passage cited by the examiner describes the validity judgement
aforementioned regarding claims 20-32. We are unpersuaded that either passage
teaches or would have suggested automatically compiling an admission stamp,
downloading the stamp into Hiroya's electronic ticket storage device, admitting a ticket
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