COMMUNICATION APPARATUS, CONTROL METHOD THEREOF AND COMPUTER READABLE MEDIUM
First Claim
Patent Images
1. A communication apparatus having a function of transmitting data at a designated time, comprising:
- a storage unit configured to store generation information to be used for generating an electronic signature;
a signature generation unit configured to generate the electronic signature by using the generation information;
a delete unit configured to delete the generation information;
a transmission reserving unit configured to reserve transmission of the data having the electronic signature generated by the signature generation unit; and
a restriction unit configured to, when the transmission of the data having the generated electronic signature is reserved by the transmission reserving unit, restrict deletion of the generation information of the electronic signature added to the reserved data.
1 Assignment
0 Petitions
Accused Products
Abstract
If electronic certificate data containing a private key and public key to be used to add an electronic signature to data with timer transmission setting is deleted, no electronic signature can be added at the set timer transmission time. To accomplish this, when timer transmission and electronic signature addition using stored key information and electronic certificate are set for transmission target data (YES in S38), deletion of the stored key information and electronic certificate to be used for generating an electronic signature is restricted (S40).
23 Citations
21 Claims
-
1. A communication apparatus having a function of transmitting data at a designated time, comprising:
-
a storage unit configured to store generation information to be used for generating an electronic signature; a signature generation unit configured to generate the electronic signature by using the generation information; a delete unit configured to delete the generation information; a transmission reserving unit configured to reserve transmission of the data having the electronic signature generated by the signature generation unit; and a restriction unit configured to, when the transmission of the data having the generated electronic signature is reserved by the transmission reserving unit, restrict deletion of the generation information of the electronic signature added to the reserved data. - View Dependent Claims (2)
-
-
3. A communication apparatus having a function of transmitting data at a designated time, comprising:
-
a storage unit configured to store generation information to be used for generating an electronic signature; a signature generation unit configured to generate an electronic signature by using the generation information; a transmission reserving unit configured to reserve a transmission so that the data having the electronic signature generated by the signature generation unit is transmitted at a designated time; a determination unit configured to determine whether the designated time is within a valid time of the generation information; and an notification unit configured to notify a user of a warning when the determination unit determines that the designated time is not within the valid time. - View Dependent Claims (4, 5, 6, 7)
-
-
8. A control method of a communication apparatus having a function of transmitting data at a designated time, comprising:
-
generating an electronic signature by using generation information being stored in a memory and to be used for generating an electronic signature; deleting the generation information; reserving transmission of the data having the generated electronic signature; and restricting deletion of the generation information of the electronic signature added to the reserved data when the transmission of the data having the generated electronic signature is reserved. - View Dependent Claims (9)
-
-
10. A control method of a communication apparatus having a function of transmitting data at a designated time, comprising:
-
generating an electronic signature by using generation being stored in a memory and to be used for generating an electronic signature; reserving a transmission so that the data having the generated electronic signature is transmitted at a designated time; determining whether the designated time is within a valid time of the generation information; and notifying a user of a warning when it is determined that the designated time is not within the valid time. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A computer readable medium storing a program for controlling a communication apparatus having a function of transmitting data at a designated time, the program comprising:
-
a code to generate an electronic signature by using generation information being stored in a memory and to be used for generating an electronic signature; a code to delete the generation information; a code to reserve transmission of the data having the generated electronic signature; and a code to restrict deletion of the generation information of the electronic signature added to the reserved data when the transmission of the data having the generated electronic signature is reserved. - View Dependent Claims (16)
-
-
17. A computer readable medium storing a program for controlling a communication apparatus having a function of transmitting data at a designated time, the program comprising:
-
a code to generate an electronic signature by using generation being stored in a memory and to be used for generating an electronic signature; a code to reserve a transmission so that the data having the generated electronic signature is transmitted at a designated time; a code to determine whether the designated time is within a valid time of the generation information; and a code to notify a user of a warning when it is determined that the designated time is not within the valid time. - View Dependent Claims (18, 19, 20, 21)
-
Specification