Abstract: A vibration-driven energy harvesting device includes a vibration-driven energy harvesting element that generates power according to vibrations of an electrode; an output unit that, when connected to a load resistor, extracts power generated by the vibration-driven energy harvesting element; a judgment unit that judges whether or not a power value of the power is greater than a predetermined threshold value; a determination unit that determines an input impedance of the output unit based on a judgment result obtained by the judgment unit; and an adjustment unit that adjusts the input impedance of the output unit according to a determination made by the determination unit.

Abstract: A solution search system, which can search for a test object, expected to output an optimal result, from at least two test objects each outputting a result based on a probability distribution, includes: a record superiority comparing unit which can obtain past records of the test objects based on an accumulation of the output results and can compare all records for superiority/inferiority; a controlling unit which can control a measurement variable of the test objects, based on the compared superiority/inferiority records, and a latest result output from the test object; and an output instructing unit which can instruct the test object, the measurement variable of which has exceeded a threshold value, to output a result, wherein the output instructing unit determines, as a desired solution, at least one test object to which the largest number of the output instructions have finally been given after repetition of the output instructions.

Abstract: There are provided a quantum dot, a plurality of quantum dots having a larger volume than the quantum dot, a light detection unit for detecting a light emission state of an output light from the plurality of quantum dots, and a light supply unit capable of supplying a control light to the plurality of quantum dots thereby to excite other exciters to a lower level, and controlling energy discharging of the exciters transiting to the lower level, wherein the control light to be supplied by the light supply unit is controlled per quantum dot based on the light emission state of the output light per quantum dot and previously-input search problem information.

Abstract: A solution search system, which can search for a test object, expected to output an optimal result, from at least two test objects each outputting a result based on a probability distribution, includes: a record superiority comparing unit which can obtain past records of the test objects based on an accumulation of the output results and can compare all records for superiority/inferiority; a controlling unit which can control a measurement variable of the test objects, based on the compared superiority/inferiority records, and a latest result output from the test object; and an output instructing unit which can instruct the test object, the measurement variable of which has exceeded a threshold value, to output a result, wherein the output instructing unit determines, as a desired solution, at least one test object to which the largest number of the output instructions have finally been given after repetition of the output instructions.

Abstract: Random number generating, encrypting, and decrypting apparatus, method thereof, program thereof, and recording medium thereof are provided. Random numbers for cryptographic applications are generated by a CA core. The CA core is composed of one-dimensional, two-state, and three-neighbor cell automaton. A total of three inputs for the own cell and both neighbor cells are input to each cell. Each cell performs a logical operation and outputs the result of the logical operation. Each cell contains a register. Each register captures the result of the logical operation in synchronization with a clock and stores the result. An output of a cell is fed back to the cell to perform an arithmetic calculation at the next time step. In this case, a rotation shift operation of which outputs of cells are shifted to the left and fed back to the cells is performed. To output random numbers having many bits, 40 bits of outputs of cells are selected.

Abstract: A part of data is extracted as an IV from cipher text at the previous time. An EX-OR gate ORes the IV and a common key and outputs a cipher key. Data to be transmitted are encrypted with the cipher key according to stream cipher. When ciphered data 15a are obtained at time tn?1, an IV extracted from the ciphered data 15a is supplied to an EX-OR gate 11b. The EX-OR gate 11b exclusively ORes the IV and a common key 12b and outputs a cipher key 13b. Since the cipher key 13b and transmission data are exclusively ORed, encryption is performed according to the stream cipher. As a result, ciphered data 15b at time tn is obtained. Next, with the IV extracted from the ciphered data 15b, encryption at time tn+1 is performed. Thereafter, at each time, a part of cipher text is used as an IV. The encrypting process is repeated.

Abstract: Random number generating, encrypting, and decrypting apparatus, method thereof, program thereof, and recording medium thereof are provided. Random numbers for cryptographic applications are generated by a CA core. The CA core is composed of one-dimensional, two-state, and three-neighbor cell automaton. A total of three inputs for the own cell and both neighbor cells are input to each cell. Each cell performs a logical operation and outputs the result of the logical operation. Each cell contains a register. Each register captures the result of the logical operation in synchronization with a clock and stores the result. An output of a cell is fed back to the cell to perform an arithmetic calculation at the next time step. In this case, a rotation shift operation of which outputs of cells are shifted to the left and fed back to the cells is performed. To output random numbers having many bits, 40 bits of outputs of cells are selected.