摘要:
A data processing apparatus includes a memory storing a program and a processor configured to execute the program to implement a process of reading signed data including a predetermined number (n) of secret sharing data sets generated for each section of time series data and a signature value calculated for the each section of time series data based on a secret sharing protocol. The n secret sharing data sets include n units of data acquired from each section of time series data and parameter information for a polynomial of a predetermined degree calculated based on the acquired n units of data. The processor further implements processes of acquiring the predetermined degree, and editing the signed data by extracting a specific number of the secret sharing data sets from the n secret sharing data sets for the each section of time series data according to the acquired predetermined degree.
摘要:
A method of certifying the existence of electronic information released on a network at a time and date. The network connects one or more computer servers and a plurality of client computers with each other. Electronic information of a web page stored in one of the plurality of client computers is accessed using information of its location from one of the computer servers based on a request from one of the client computers. A copy of the electronic information is then obtained. Attribute information is generated from the location, access time, and date when the electronic information is accessed. An electronic certificate may be generated by uniquely specifying the electronic information and the attribute information as inherent information identifying the electronic information. The copy of the electronic information is stored in a memory by tying up the electronic information with the electronic certificate and the attribute information. At least the electronic certificate, the attribute information, and preferably the copy of the electronic information can also be read and provided from the memory to the one of the client computers or its operator as a requester.
摘要:
An image forming apparatus configured to generate image data by reading information in a paper, includes a machine signature generation part configured to generate a first electronic signature for the image data by using a secret key peculiar to the image forming apparatus, and an operator signature generation part configured to generate a second electronic signature for the image data by using a secret key peculiar to an operator of the image forming apparatus.
摘要:
An approach for storing and maintaining data is disclosed. One or more sensors are provided for detecting unauthorized access to a first non-volatile storage. If unauthorized access to the first non-volatile storage is detected, then the data on the first non-volatile storage is deleted by overwriting the data on the first non-volatile storage with a predetermined value so that the data cannot be recovered. The first non-volatile storage is registered with a registration authority to provide authentication of the data maintained on the first non-volatile storage.
摘要:
An approach for storing and maintaining data involves determining whether data has been stored on a first non-volatile storage for a specified period of time. If so, then the data on the first non-volatile storage is deleted by overwriting the data on the first non-volatile storage with a predetermined value so that the data cannot be recovered. The first non-volatile storage is registered with a registration authority to provide authentication of the data maintained on the first non-volatile storage. A duplicate copy of the data is stored on a second non-volatile storage and if a determination is made that the data has been stored on a first non-volatile storage for a specified period of time, then the duplicate copy of the data is deleted by overwriting the duplicate copy of the data on the second non-volatile storage with the predetermined value.
摘要:
A data generation apparatus includes a processor that executes a process including obtaining target data sequentially from time-series data, the target data including n (n being an integer greater than or equal to 2) data items in a predetermined section of the time-series data, calculating parameter information satisfying a (k−1) order polynomial based on the target data, the (k−1) order polynomial including k random values, k being an integer greater than or equal to 1 and less than n, associating the target data to the parameter information, outputting the target data and the parameter information associated to the target data, attaching a signature to secret information based on a secret distributed protocol. The secret information is calculable by using k pairs of data including the target data and the parameter information associated to the target data, and outputting the secret information attached with the signature.
摘要:
A method of certifying the existence of electronic information released on a network at a time and date. The network connects one or more computer servers and a plurality of client computers with each other. Electronic information of a web page stored in one of the plurality of client computers is accessed using information of its location from one of the computer servers based on a request from one of the client computers. A copy of the electronic information is then obtained. Attribute information is generated from the location, access time, and date when the electronic information is accessed. An electronic certificate may be generated by uniquely specifying the electronic information and the attribute information as inherent information identifying the electronic information. The copy of the electronic information is stored in a memory by tying up the electronic information with the electronic certificate and the attribute information. At least the electronic certificate, the attribute information, and preferably the copy of the electronic information can also be read and provided from the memory to the one of the client computers or its operator as a requester.
摘要:
The reliability due to time-elapsing variation of the magneto-optic disk and the data recorded on the magneto-optic disk are evaluated. A magneto-optic disk driving apparatus can preserve a sheet of magneto-optic disk during the period over the endurable number of years, and a file manager can issue an alarm to the user in accordance with the deterioration state of the magneto-optic disk. The magneto-optic disk drive controlling apparatus for controlling the magneto-optic disk driving apparatus capable of taking in or taking out the magneto-optic disk by the operation of user's hands or the automatic transportation by use of the host computer comprises a disk deterioration judging (grasping) measure and a disk deterioration tolerance excess alarming measure. The file manager for realizing the IS&C file format in the magneto-optic disk by performing the operation of reading/writing the data on the magneto-optic disk in the magneto-optic disk driving apparatus by use of the execution program comprises a disk deterioration state grasping measure and a disk deterioration state alarming measure.
摘要:
A data generation apparatus includes a processor that executes a process including obtaining target data sequentially from time-series data, the target data including n (n being an integer greater than or equal to 2) data items in a predetermined section of the time-series data, calculating parameter information satisfying a (k−1) order polynomial based on the target data, the (k−1) order polynomial including k random values, k being an integer greater than or equal to 1 and less than n, associating the target data to the parameter information, outputting the target data and the parameter information associated to the target data, attaching a signature to secret information based on a secret distributed protocol. The secret information is calculable by using k pairs of data including the target data and the parameter information associated to the target data, and outputting the secret information attached with the signature.
摘要:
A data processing apparatus includes a memory storing a program and a processor configured to execute the program to implement a process of reading signed data including a predetermined number (n) of secret sharing data sets generated for each section of time series data and a signature value calculated for the each section of time series data based on a secret sharing protocol. The n secret sharing data sets include n units of data acquired from each section of time series data and parameter information for a polynomial of a predetermined degree calculated based on the acquired n units of data. The processor further implements processes of acquiring the predetermined degree, and editing the signed data by extracting a specific number of the secret sharing data sets from the n secret sharing data sets for the each section of time series data according to the acquired predetermined degree.