Abstract: A measuring device has a consumption measurer to measure a consumption of at least one target equipment at every unit time within a predetermined measurement area, a consumption storage to store the measured consumption, a secret key storage to store a secret key shared with a key management device, an encryption key updater to update an encryption key at every predetermined period based on the secret key and time information, an encryption key storage to store the encryption key, an encryptor to generate encrypted data by encrypting the consumption using the encryption key stored in the encryption key storage, an encrypted data storage to store the encrypted data, and a communication controller to control transmission of the encrypted data, which is stored in the encrypted data storage, to a total consumption detecting device.

Abstract: According to an embodiment, a data converting device is connected to a power meter configured to add up power consumptions of electrical equipment. The device includes a receiving unit configured to receive power consumptions per predetermined unit time added up by the power meter; and a calculating unit configured to calculate a second sequence to be stored as added up power consumptions in a storage unit from a first sequence containing the power consumptions per unit time received by the receiving unit in time series by using a conversion rule for converting a value of a second element in the second sequence based on a value of a first element in the first sequence. The second sequence has no privacy information and, the second sequence can be used for calculating a total value of the first sequence.

Abstract: According to one embodiment, the data transmitting device includes a storing unit, an authenticator generating unit, and a communication unit. The storing unit stores accuracy information based on an accuracy of synchronization between a first clock and a second clock. The first clock indicates a current time of the data transmitting device. The second clock indicates a current time of other device to be a destination of a data packet. The authenticator generating unit calculates a first time by adding a predetermined time to the current time of the data transmitting device, calculates a second time by adjusting the first time using the accuracy information, and generates an authenticator using the second time, the data packet, and a predetermined secret key. The communication unit transmits, to the other device, the data packet with the authenticator at a third time obtained by adding the second time to a predetermined time.

Abstract: A measuring device has a consumption measurer to measure a consumption of at least one target equipment at every unit time within a predetermined measurement area, a consumption storage to store the measured consumption, a secret key storage to store a secret key shared with a key management device, an encryption key updater to update an encryption key at every predetermined period based on the secret key and time information, an encryption key storage to store the encryption key, an encryptor to generate encrypted data by encrypting the consumption using the encryption key stored in the encryption key storage, an encrypted data storage to store the encrypted data, and a communication controller to control transmission of the encrypted data, which is stored in the encrypted data storage, to a total consumption detecting device.

Abstract: An apparatus includes a first processing unit to judge, whether the route information storing unit stores a second next destination address; a second processing unit to judge whether a received packet includes an message authentication code, in the case where the route-information storing unit stores the second next destination address; a third processing unit to judge whether the key-information storing unit stores a second shared key, which is a first shared key shared between the information processing apparatus, in the case where the received packet does not include the message authentication code for the second next destination address; a third packet generating unit to generate a third packet, which includes a next destination and information indicating that the generation of an message authentication code is impossible, in the case where the key information storing unit does not store the second shared key.

Abstract: According to an aspect of the embodiment, there is provided a transmitting apparatus, including a data storage, a first key storage, a second key storage, an additional information generating unit, a first authenticator generating unit, a second authenticator generating unit, a third authenticator generating unit, and a packet transmitting unit. a judging unit that judges the candidate is admitted as the second authenticator, when the candidate contains a common part of the first authenticator. a third authenticator generating unit generates a third authenticator based on a second authenticator that is a second authenticator candidate contains a common part of the first authenticator. The packet transmitting unit transmits a packet including the data and the third authenticator.

Abstract: According to an aspect of the present invention, there is provided a data transmitting apparatus including an authenticator generating unit and a communicating unit. The authenticator generating unit generates a first authenticator by using a first encryption key and generates a second authenticator including a first to an n-th fragment information items by using a second encryption key. The communicating unit transmits a first packet including the first authenticator and the first fragment information item to a destination device and, after the first packet is transmitted, if a response indicating successful authentication is not received from the destination device within a certain period, sequentially transmits an i-th packet (i is an integer being 2 or more and n or less) including the i-th fragment information item to the destination device.

Abstract: According to an aspect of the embodiment, there is provided a transmitting apparatus, including a data storage, a first key storage, a second key storage, an additional information generating unit, a first authenticator generating unit, a second authenticator generating unit, a third authenticator generating unit, and a packet transmitting unit. a judging unit that judges the candidate is admitted as the second authenticator, when the candidate contains a common part of the first authenticator. a third authenticator generating unit generates a third authenticator based on a second authenticator that is a second authenticator candidate contains a common part of the first authenticator. The packet transmitting unit transmits a packet including the data and the third authenticator.

Abstract: According to one embodiment, the data transmitting device includes a storing unit, an authenticator generating unit, and a communication unit. The storing unit stores accuracy information based on an accuracy of synchronization between a first clock and a second clock. The first clock indicates a current time of the data transmitting device. The second clock indicates a current time of other device to be a destination of a data packet. The authenticator generating unit calculates a first time by adding a predetermined time to the current time of the data transmitting device, calculates a second time by adjusting the first time using the accuracy information, and generates an authenticator using the second time, the data packet, and a predetermined secret key. The communication unit transmits, to the other device, the data packet with the authenticator at a third time obtained by adding the second time to a predetermined time.

Abstract: An authenticating device communicating with a server device includes: a dividing unit that divides secret information into plural secret fragments by a threshold secret sharing scheme; a first generating unit that generates plural cryptographic fragments by encrypting the secret fragments using first plural passwords; a first transmitting unit that transmits the cryptographic fragments to the server device; a first receiving unit that receives the cryptographic fragments from the server device, a second generating unit that generates plural secret fragment candidates by decrypting the cryptographic fragments using second plural passwords; a third generating unit that obtains a verifying information candidate by the threshold secret sharing scheme using a group of the secret fragment candidates; a second transmitting unit that transmits the verifying information candidate to the server device; and a second receiving unit that receives result information of comparing the verifying information candidate with ver

Abstract: According to an embodiment, in a power usage calculation system, a data management system connected to electric power meters adding up power usage of electric apparatuses and an energy management system are interconnected through a network. Plural pieces of the first partial information are calculated by using the power usage added up by the electric power meters. The plural pieces of the first partial information are stored in storage servers. Each storage server calculates second partial information by using a plurality of pieces of the first partial information of the power usage added up by the electric power meters and transmits the calculated second partial information to the energy management system. The energy management system receives the second partial information respectively transmitted from the storage servers and calculates a total amount of the power usage added up by the electric power meters by using the received second partial information.

Abstract: An apparatus includes a first processing unit to judge, whether the route information storing unit stores a second next destination address; a second processing unit to judge whether a received packet includes an message authentication code, in the case where the route-information storing unit stores the second next destination address; a third processing unit to judge whether the key-information storing unit stores a second shared key, which is a first shared key shared between the information processing apparatus, in the case where the received packet does not include the message authentication code for the second next destination address; a third packet generating unit to generate a third packet, which includes a next destination and information indicating that the generation of an message authentication code is impossible, in the case where the key information storing unit does not store the second shared key.

Abstract: According to an embodiment, a data converting device is connected to a power meter configured to add up power consumptions of electrical equipment. The device includes a receiving unit configured to receive power consumptions per predetermined unit time added up by the power meter; and a calculating unit configured to calculate a second sequence to be stored as added up power consumptions in a storage unit from a first sequence containing the power consumptions per unit time received by the receiving unit in time series by using a conversion rule for converting a value of a second element in the second sequence based on a value of a first element in the first sequence. The second sequence has no privacy information and, the second sequence can be used for calculating a total value of the first sequence.

Abstract: According to an aspect of the present invention, there is provided a data transmitting apparatus including an authenticator generating unit and a communicating unit. The authenticator generating unit generates a first authenticator by using a first encryption key and generates a second authenticator including a first to an n-th fragment information items by using a second encryption key. The communicating unit transmits a first packet including the first authenticator and the first fragment information item to a destination device and, after the first packet is transmitted, if a response indicating successful authentication is not received from the destination device within a certain period, sequentially transmits an i-th packet (i is an integer being 2 or more and n or less) including the i-th fragment information item to the destination device.

Abstract: According to one embodiment, an information processing device includes an obtaining unit, a generating unit, and a transmitting unit. The obtaining unit obtains a power consumption of electrical equipment at least once per unit time. The generating unit generates a plurality of pieces of partial information by using a first power consumption and a first value calculated according to a predetermined rule. The generating unit generates a plurality of pieces of partial information by using a second power consumption and the first value. The first power consumption is obtained at a first period. The second power consumption is obtained at a second period different from the first period. The second power consumption is obtained later than the first power consumption. The transmitting unit transmits the pieces of partial information to a plurality of different storage servers, respectively.

Abstract: According to an embodiment, a server to which a plurality of power meters each measuring an amount of power consumption of an electric appliance is connected, includes a receiving unit, a first storage unit and a calculating unit. The receiving unit receives a calculation result. The calculation result is calculated based on the amount of power consumption measured by each of the plurality of power meters and each of random numbers generated according to a probability distribution by each of the plurality of power meters. The first storage unit stores therein parameters for generating random numbers. The calculating unit calculates an estimation value of a sum or average of the amounts of power consumption using the calculation results and the parameters. The estimation value is used for determining whether to perform power control.

Abstract: According to one embodiment, there is provided a data transmission processing device, including: a identifying portion configured to identify a module having sent out data; a storage portion configured to store a sending-out method definition list defined in accordance with each source module and indicating a processing method for the data, the processing method including a data conversion method or permission/prohibition of communication; a determining portion configured to determine a processing method corresponding to the source module identified by the identifying portion by referring to the sending-out method definition list; a converting portion configured to convert the data when the data conversion method is included in the processing method determined by the determining portion; and a transmission portion configured to send out the data or the converted data when the determining portion concludes that communication is permitted.

Abstract: Communication connection method for connecting server computer to client computer via network, comprises storing group identification information items for identifying groups, in relation to information indicating number of connection request packets uniquely and secretly allocated to each group of groups, each group including users allowed to access server computer, counting connection request packets received from client computer within preset period to obtain counted number, determining whether information corresponds to counted number, acquiring one group of groups to which connection request packets corresponding to counted number are allocated, if information corresponds to counted number, determining whether resources of server computer are allocated to group indicated by acquired group identification item, generating connection request acknowledgement packet in response to at least one of received connection request packets, and transmitting generated connection request acknowledgement packet to netwo

Abstract: A content reproduction apparatus (a) reads a specific server identifier, from a recording medium storing the specific server identifier and a content data item including a destination identifier, to store the specific server identifier in a table, (b) certifies a server corresponding to the specific server identifier, (c) certifies the recording medium by use of a data item in a storage area of the recording medium designated by the server being certified, (d) reproduces the content data item stored in the recording medium, (e) acquires the destination identifier while reproducing the content data item, (f) determines whether the destination identifier being acquired is equal to the specific identifier stored in the table, and (g) accesses to the server when the destination identifier being acquired is equal to the specific server identifier, and the server and the recording medium are certified.

Abstract: A file editing system that provides a high file content secrecy, a file version management and an asynchronous editing is disclosed. For a high file content secrecy, the block data of files managed by a file management server device are enciphered in units of blocks, and a client device obtains the block data of the desired file in enciphered state, deciphers the obtained block data in units of blocks, carries out an editing of the desired file to obtain editing data, enciphers the editing data in units of blocks, and transmits the enciphered editing data to the file management server device.