Abstract: In an information processing device, a fluctuation estimation unit acquires from a noise source a plurality of measured values having bits of M digits, where M is an integer exponent of a power of two. A bit extraction unit acquires information relating to a number of effective bits of N digits used in generating a random number, where N is an integer less than M, based on the acquired plurality of values. Using the information relating to the number of effective bits, a bit coupling unit generates a random number having effective bits of L digits, where L is a predetermined integer greater than or equal to N.

Abstract: A terminal exchanges a common key generated using a seed, the randomness of which was recognized in advance, with a verification server. The terminal generates verification data using a plurality of measured values from a noise source. The terminal encrypts the verification data with the common key and transmits the verification data to the verification server. The verification server verifies the randomness of verification data obtained by decrypting the encrypted verification data with the common key. When it is determined that the verification data has randomness, the verification server transmits a verification result indicating that the randomness of the verification data is recognized to the terminal. The terminal acquires a plurality of measured values and generates a new seed in accordance with the verification result from the server and preserves the new seed in a secure area.

Abstract: In an information processing device, a fluctuation estimation unit acquires from a noise source a plurality of measured values having bits of M digits, where M is an integer exponent of a power of two. A bit extraction unit acquires information relating to a number of effective bits of N digits used in generating a random number, where N is an integer less than M, based on the acquired plurality of values. Using the information relating to the number of effective bits, a bit coupling unit generates a random number having effective bits of L digits, where L is a predetermined integer greater than or equal to N.

Abstract: A terminal exchanges a common key generated using a seed, the randomness of which was recognized in advance, with a verification server. The terminal generates verification data using a plurality of measured values from a noise source. The terminal encrypts the verification data with the common key and transmits the verification data to the verification server. The verification server verifies the randomness of verification data obtained by decrypting the encrypted verification data with the common key. When it is determined that the verification data has randomness, the verification server transmits a verification result indicating that the randomness of the verification data is recognized to the terminal. The terminal acquires a plurality of measured values and generates a new seed in accordance with the verification result from the server and preserves the new seed in a secure area.

Abstract: Provided is a data processing method in a data processing device that is connected to an external storage device and that is equipped with a storage device, the method including: receiving a writing instruction to store first data in the storage device; dividing the first data into multiple pieces of division data; storing at least one or more of the pieces of division data in the external storage device; and storing second data different from the first data in the storage device, in which the second data is associated with the first data and the multiple pieces of division data. With the data processing method, security in data management can be improved.

Abstract: It is an objective to diminish time required to read or write divided data. An information processing equipment that can be connected to a storage includes a division processing section for dividing original data into a plurality of sets of divided data and a storage location selection section that selects either the storage or a storage section of the information processing equipment as a divided data storage location and that stores the divided data into the selected storage location, wherein the division processing section determines a division ratio of divided data according to a data reading rate and/or a data writing rate of the storage location selected by the storage location selection section.

Abstract: Provided is a data processing method in a data processing device that is connected to an external storage device and that is equipped with a storage device, the method including: receiving a writing instruction to store first data in the storage device; dividing the first data into multiple pieces of division data; storing at least one or more of the pieces of division data in the external storage device; and storing second data different from the first data in the storage device, in which the second data is associated with the first data and the multiple pieces of division data. With the data processing method, security in data management can be improved.