Abstract: According to one embodiment, there is provided a charging management system including a display controller configured to cause a display device to display a time slot which is settable as a new desired rental time slot of an electric vehicle, based on a charging time slot on an assumption that charging to the vehicle by a second charging device is performed, and a scheduling module configured to set the desired rental time slot as a time slot in which rental is possible, if the charging to the electric vehicle for enabling the rental is possible in the input desired rental time slot and the rental time slot in which the rental reservation has been made.

Abstract: According to one embodiment, there is provided a charging management system. Based on an estimated duration from a time when an electric vehicle having arrived at each of a charging facilities starts charging until the charging is complete, the system determines the charging facility a charging facility utilization of which is to be recommended to be one of the charging facilities related to a path to a destination which has a shortest maximum wait time from a time when a plurality of electric vehicles arrive at the charging facility until the charging is complete, and reports information indicative of the determined charging facility to the electric vehicle not having arrived at the charging facility.

Abstract: According to an embodiment, there is provided a consumed power amount estimation apparatus including an estimation unit configured to estimate a power amount necessary for an electric vehicle having a similar power consumption tendency to run, based on a parameter used to compensate for information affecting power consumption by running of the electric vehicle based on consumed power amount information of each of a plurality of electric vehicles having similar power consumption tendencies.

Abstract: A purchaser apparatus stores “anonymous order information including an order ID and purchaser identity verifying information” and “purchaser identity proving secret information”. A shop apparatus stores “anonymous order information including an order ID and purchaser identity verifying information”. If necessary, a purchaser sends a request including an order ID and zero knowledge proving information that a purchaser knows the purchaser identity proving secret information, from a purchaser apparatus to a shop apparatus. A shop apparatus verifies the zero knowledge proving information, based on purchaser identity verifying information retrieved from an order ID included in the request. Therefore, the unlinkability for past use is eliminated if necessary, and inconvenience caused by the unlinkability is eliminated.

Abstract: According to one embodiment, there is provided a charging management system. Based on an estimated duration from a time when an electric vehicle having arrived at each of a charging facilities starts charging until the charging is complete, the system determines the charging facility a charging facility utilization of which is to be recommended to be one of the charging facilities related to a path to a destination which has a shortest maximum wait time from a time when a plurality of electric vehicles arrive at the charging facility until the charging is complete, and reports information indicative of the determined charging facility to the electric vehicle not having arrived at the charging facility.

Abstract: According to an embodiment, there is provided a consumed power amount estimation apparatus including an estimation unit configured to estimate a power amount necessary for an electric vehicle having a similar power consumption tendency to run, based on a parameter used to compensate for information affecting power consumption by running of the electric vehicle based on consumed power amount information of each of a plurality of electric vehicles having similar power consumption tendencies.

Abstract: According to one embodiment, there is provided a charging management system including a display controller configured to cause a display device to display a time slot which is settable as a new desired rental time slot of an electric vehicle, based on a charging time slot on an assumption that charging to the vehicle by a second charging device is performed, and a scheduling module configured to set the desired rental time slot as a time slot in which rental is possible, if the charging to the electric vehicle for enabling the rental is possible in the input desired rental time slot and the rental time slot in which the rental reservation has been made.

Abstract: According to one embodiment, the resource access unit accesses a first resource including a replication target object and policy data assigned to the object. The policy data includes base policy data including a first condition and assertion policy data including a second condition. The first retrieval unit obtains first attribute data for accessing the first resource. The first policy evaluation unit determines whether the first attribute satisfies the first condition. When the first condition is satisfied, the copy processing unit executes the copy processing for copying the object. The second retrieval unit obtains the second attribute data for accessing the second resource. The second policy evaluation unit determines whether the second attribute data satisfies the second condition. When the second condition is satisfied, the paste processing unit executes paste processing for pasting the object to the second resource.

Abstract: According to one embodiment, an access control apparatus suspends the resource access event prior to access of the resource access device when the resource access event is started. The access control apparatus acquires attribute information from the attribute management device by using the deny-type policy in the access control policy and decides the permission or the denial of the access based on this attribute information and the deny-type policy. The access control apparatus releases the suspension when a result of decision in the supplied access decision result is indicative of the permission and no obligation-type policy is present in the access decision response.

Abstract: According to one embodiment, an access control apparatus suspends the resource access event prior to access of the resource access device when the resource access event is started. The access control apparatus acquires attribute information from the attribute management device by using the deny-type policy in the access control policy and decides the permission or the denial of the access based on this attribute information and the deny-type policy. The access control apparatus releases the suspension when a result of decision in the supplied access decision result is indicative of the permission and no obligation-type policy is present in the access decision response.

Abstract: A content distribution/browsing system is disclosed. First to (m?1)th encrypted content items E(K1, C1?K2,1), . . . , E(Km?1, Cm?1?Km,1) contain second to m-th (next in order) sharing keys K2,1, . . . , Km,1, respectively. When desirous of browsing an (i+1)th content item Ci+1, the (i+1)th sharing key Ki+1,1 is acquired by browsing an immediately preceding i-th content item Ci.

Abstract: According to one embodiment, the resource access unit accesses a first resource including a replication target object and policy data assigned to the object. The policy data includes base policy data including a first condition and assertion policy data including a second condition. The first retrieval unit obtains first attribute data for accessing the first resource. The first policy evaluation unit determines whether the first attribute satisfies the first condition. When the first condition is satisfied, the copy processing unit executes the copy processing for copying the object. The second retrieval unit obtains the second attribute data for accessing the second resource. The second policy evaluation unit determines whether the second attribute data satisfies the second condition. When the second condition is satisfied, the paste processing unit executes paste processing for pasting the object to the second resource.

Abstract: A secret sharing apparatus according to the present invention is based on a (k,n)-threshold scheme with a threshold of at least 4 but is still operational with a threshold of at least 2. The secret sharing apparatus generates a generator matrix (G) of GF(2) in which any k of n column vectors are at a full rank, divides secret information into n?1 pieces to generate divided secret data (K(1), . . . , K(n?1)), generates random data (U(0,1), . . . , U(k?2,n?1)), calculates the product of matrixes of the divided secret data, the random data, and the generator matrix (G), assigns the j×(n?1)+ith column of the calculation result to sharing partial data (D(j,i)) to calculate sharing partial data (D(j,1)), generates header information (H(j)), and individually distributes n pieces of sharing information (D(0), . . . , D(n?1)) made up of the header information (H(j)) and sharing partial data (D(j,i)) to n storage apparatuses.

Abstract: A secret sharing device of (k, n) threshold scheme creates a generator matrix G, first divided secret data, and random number data, calculates shared partial data based on the product of matrices with the random number data, the divided secret data, and the generator matrix G, and delivers the shared information formed by the shared partial data and the header information individually to the storage units. The secret sharing device calculates a recovery matrix and multiplies the shared information by the recovery matrix, hence to recover the secret information.

Abstract: A recording device which backs up a content ? in a recording medium and a recording device which restores the content are registered in a server so as to belong to the same domain group. When the recording device tries to restore the content, the restore is permitted only when both the recording devices belong to the same domain group. When there is a refresh request of the domain group, the domain group is invalidated only when a refresh period has passed. When a refresh number recorded in the recording device is less than or equal to the refresh number recorded in the recording device, the recording device backs up and locally merges the content recorded in the recording device into the recording medium.

Abstract: A secret sharing device of (k, n) threshold scheme creates a generator matrix G, first divided secret data, and random number data, calculates shared partial data based on the product of matrices with the random number data, the divided secret data, and the generator matrix G, and delivers the shared information formed by the shared partial data and the header information individually to the storage units. The secret sharing device calculates a recovery matrix and multiplies the shared information by the recovery matrix, hence to recover the secret information.

Abstract: A content distribution/browsing system is disclosed. First to (m?1)th encrypted content items E(K1, C1?K2,1), . . . , E(Km?1, Cm?1?Km,1) contain second to m-th (next in order) sharing keys K2,1, . . . , Km,1, respectively. When desirous of browsing an (i+1)th content item Ci+1, the (i+1)th sharing key Ki+1,1 is acquired by browsing an immediately preceding i-th content item Ci.

Abstract: A secret sharing apparatus according to the present invention is based on a (k,n)-threshold scheme with a threshold of at least 4. The secret sharing apparatus generates a generator matrix (G) of GF(2) in which any k of n column vectors are at a full rank, divides secret information into n?1 pieces to generate divided secret data (K(1), . . . , K(n?1)), generates random data (U(0,1), . . . , U(k?2,n?1)), calculates the product of matrixes of the divided secret data, the random data, and the generator matrix (G), assigns the j×(n?1)+ith column of the calculation result to sharing partial data (D(j,i)) to calculate sharing partial data (D(j,1)), generates header information (H(j)), and individually distributes n pieces of sharing information (D(0), . . . , D(n?1)) made up of the header information (H(j)) and sharing partial data (D(j,i)) to n storage apparatuses.

Abstract: A data processing apparatus capable of updating and writing a plurality of distributed information items generated based on to-be-held secret information with respect to a data storage device in which access is not limited includes a secret distribution processing portion which generates a plurality of distributed information items updated this time according to secret information to be held this time based on a threshold value secret distribution method, and a distributed information management portion which selects recording positions of distributed information items updated this time to leave behind distributed information items of a number less than a threshold value among a plurality of distributed information items updated last time with respect to a plurality of distributed information items updated and stored in the data storage device and writes distributed information items updated this time to the data storage device based on the selected recording positions.

Abstract: A purchaser apparatus stores “anonymous order information including an order ID and purchaser identity verifying information” and “purchaser identity proving secret information”. A shop apparatus stores “anonymous order information including an order ID and purchaser identity verifying information”. If necessary, a purchaser sends a request including an order ID and zero knowledge proving information that a purchaser knows the purchaser identity proving secret information, from a purchaser apparatus to a shop apparatus. A shop apparatus verifies the zero knowledge proving information, based on purchaser identity verifying information retrieved from an order ID included in the request. Therefore, the unlinkability for past use is eliminated if necessary, and inconvenience caused by the unlinkability is eliminated.