Abstract: An object of the present invention is to a provide tamper resistant information processing unit that is used as an IC card with a high level of security. To achieve the above-mentioned object, the information unit of the present invention comprises: a program container part for storing a program; a memory for storing data; an arithmetic unit for performing specified processing according to the program; a data bus for connecting the memory to the arithmetic unit; and a transform function for transforming a logical address and a physical address of the memory, said logical address being used for arithmetic operation by the arithmetic unit, said physical address being set at random corresponding to the logical address at each arithmetic operation or every time the information processing unit is started up.

Abstract: While a ferrule or a laser beam is being shifted in an axial direction, the laser beam is applied, thereby forming a plurality of welded portions at the boundary between a coating of an optical fiber and the ferrule. A YAG laser in a Q switch pulse mode is used to provide a laser beam. The beam. The YAG laser in the Q switch pulse mode is preferably oscillated in a pulse exciting system. The ferrule is made of transparent or semi-transparent synthetic resin. The coating of the optical fiber is made of translucent synthetic resin. In this way, an optical fiber fixing method can be provided which can surely fix an optical fiber and a ferrule in a shortened time, and minimize the thermal influence on the vicinity of the portion to be processed.

Abstract: A radiation imaging system comprises a radiation image detection panel having means for converting radiations into electric signals, and an outer enclosure which holds therein the radiation image detection panel, and further comprises an elastic support means. The radiation image detection panel is elastically supported by the elastic support means toward the outer enclosure.

Abstract: A ferrule for a connector of an optical fiber, which can be joined in short time with the optical fiber and can position the optical fiber securely, and a method of welding the ferrule and the optical fiber are provided. Projections 20 for contacting with a surface of an optical fiber 31 are disposed, preferably at equal intervals, along a circumferential direction of an inner wall 35b of a through hole 35a of a ferrule 35. By inserting the optical fiber 31 into the ferrule 35, and by heating and melting the projections 20 and an inner cover 33 of the optical fiber 31 by ultrasonic vibration, the optical fiber 31 and the ferrule 35 are joined together.

Abstract: As fast algorithm for RSA cryptosystem, a calculation method employing the Chinese Remainder Theorem is widely used today. However, modular calculation modulo P (P: secret prime) has to be carried out in the first step of the calculation, and the modular calculation x mod P, explicitly using the secret prime P, has been used as the target of attack from long ago. To resolve the problem, there is provided a calculation method, in which x mod P is calculated not directly, but x*(2{circumflex over ( )}n) mod P is calculated by previously multiplying x by 2{circumflex over ( )}(m+n) mod P or 2{circumflex over ( )}(2n) mod P and multiplying the result by 2{circumflex over ( )}(−m) or 2{circumflex over ( )}(−n) afterward. When Montgomery modular multiplication is used, subsequent process is carried out according to the conventional method.

Abstract: An object of the present invention is to prevent secret information that is being internally processed from being inferred through operational information of a secured device, including the current consumption information. One solution is provided by an information processing device having at least a key generation apparatus that generates key data automatically, an encryption unit that encrypts data with the corresponding key data, a register that stores a plurality of encrypted data items with the corresponding encryption key data items, and an arithmetic unit that performs operations using data expressed with the corresponding encryption key data and new key data as the input, encrypts the operation result with new input key data, and outputs the result, thereby being capable of performing internal processing on an encrypted data expression. Accordingly, only encrypted data is transferred on the internal or external data bus line.

Abstract: A method and device are provided for accessing a memory of an information processing device in order to prevent tampering to a program in the memory. In one example, the method involves making it difficult to extract inner information inside an integrated circuit (IC) chip via analyzing variations of power consumption of the IC chip. A relationship between address information processed inside the IC chip and the power consumption is made inconspicuous. The Difference between hamming distances of certain memory portions is reduced so as to reduce changes of a program counter in each execution of conditional branch instructions.

Abstract: An object of the present invention is to provide a vehicle backward movement assisting apparatus during parking, in which a steering assisting guide display is performed so that a driver can easily comprehend a steering rate and time frame, a steering amount or a backward movement amount in parking a vehicle. When a vehicle starts a turn, a detecting means of a rotation speed difference between a right wheel and a left wheel detects a rotation speed difference between a right wheel and a left wheel. When the difference becomes the predetermined value or larger, it is recognized that the vehicle starts the turn. The angle speed, which is detected by a yaw rate sensor since the start of the turn, is added as a yaw angle. Then, the vehicle is stopped and a shift lever is operated so as to be set to a backward movement position, whereby the yaw angle at this time is detected as the turn angle since the time of starting the turn.

Abstract: An object of the present invention is to prevent secret information that is being internally processed from being inferred through operational information of a secured device, including the current consumption information. One solution is provided by an information processing device having at least a key generation apparatus that generates key data automatically, an encryption unit that encrypts data with the corresponding key data, a register that stores a plurality of encrypted data items with the corresponding encryption key data items, and an arithmetic unit that performs operations using data expressed with the corresponding encryption key data and new key data as the input, encrypts the operation result with new input key data, and outputs the result, thereby being capable of performing internal processing on an encrypted data expression. Accordingly, only encrypted data is transferred on the internal or external data bus line.

Abstract: While a ferule 35 or a laser beam is being shifted in an axial direction, the laser beam is applied, thereby forming a plurality of welded portions 55 at the boundary between a coating 33 of an optical fiber 31 and the ferule 35. A YAG laser in a Q switch pulse mode is used to provide a laser beam. The YAG laser in the Q switch pulse mode is preferably oscillated in a pulse exciting system. The ferule 35 is made of transparent or semi-transparent synthetic resin. The coating 33 of the optical fiber 31 is made of translucent synthetic resin. In this way, an optical fiber fixing method can be provided which can surely fix an optical fiber and a ferule in a shortened time, and minimize the thermal influence on the vicinity of the portion to be processed.

Abstract: A ferrule for a connector of an optical fiber, which can be joined in short time with the optical fiber and can position the optical fiber securely, and a method of welding the ferrule and the optical fiber are provided. Projections 20 for contacting with a surface of an optical fiber 31 are disposed, preferably at equal intervals, along a circumferential direction of an inner wall 35b of a through hole 35a of a ferrule 35. By inserting the optical fiber 31 into the ferrule 35, and by heating and melting the projections 20 and an inner cover 33 of the optical fiber 31 by ultrasonic vibration, the optical fiber 31 and the ferrule 35 are joined together.

Abstract: A frame of still picture data is captured at an instant specified by a user from video signals supplied from a given video source, such as a television receiver, a video camera, etc., and the image data is displayed. When the user specifies an area of image to be cut out from the displayed still picture, the image data in the specified area is cut out and recorded as a cutout image. Each cutout image recorded is displayed in the form of an icon. When any of the icons is selected by the user, the corresponding cutout image data is read and pasted in a part to be changed in the original image data. Thus an image can be easily created by user's choice.

Abstract: An oscillator is provided that can be flexibly retrofitted to become usable for a wide range of applications, that is compatible with different users'requests, and that enables a user to design a high-frequency unit using the oscillator without concerns. The oscillator includes a SAW resonator and an oscillation unit provided in the form of an integrated circuit. The SAW resonator and oscillation unit are encapsulated in the same package and then sealed. The whole oscillator is thus provided in the form of a module. The oscillation circuit includes a first adjustment terminal with which a current flowing through a current source is adjusted externally. A resistor offering a desired resistance is connected between the first adjustment terminal and a ground terminal, whereby a negative resistance can be adjusted. Moreover, a second adjustment terminal with which a current flowing through a current source in an amplification circuit is included.

Abstract: The invention provides an oscillator and a control method for controlling the oscillator which reliably oscillates even when the oscillator is driven at a low voltage. An oscillator repeats a startup operation and a suspension of the startup operation by turning on and off a switch with half a period of a Schmitt trigger oscillator circuit, until a piezoelectric oscillator circuit is put into a normal oscillation state. The oscillator thus creates a number of opportunities of transient response allowing the oscillation amplitude of the piezoelectric oscillator circuit to grow, and reliably oscillates.

Abstract: A tamper-resistant information device for use with IC cards, etc. having high security. The tamper-resistant information device has an input unit for inputting a signal, a storage unit for storing a program, an operation unit for performing predetermined data processing according to a program, and an output unit for outputting a signal. The program stored in the above storage unit includes one or more data processing instructions giving an execution direction to the operation unit.

Abstract: An oscillator 10 with a noise reduction function has a memory 80 that memorizes modulation data DM for performing the spread spectrum modulation input from an output terminal fout, a modulation signal output circuit 60 that generates a modulation signal SM from the modulation data DM memorized in the memory 80, and a mixer 53 that overlays the modulation signal SM on the control voltage VC of a voltage control oscillator (VCO) 54 of a PLL circuit 50, and it becomes possible to output a spread spectrum modulated output signal CLv under a specification desired by a user by memorizing in the memory 80 the modulation data DM that corresponds to the spread spectrum modulation the user tries to set.

Abstract: In an information processing method, an ordinary adder is structurally added with an embedding unit for embedding an error detection code in input data A, B, an error detection code checking unit, and an error detection code removing unit. Firstly, error detection data D is generated and A and B are multiplied by the D. Next, operation of AD+BD=(A+B)*D=CD is made by using an adder. In the error detection checking unit, remainders modulo D are calculated in respect to an operation result and it is confirmed that the result is zero. If CD mod D≠0, an error signal is delivered. The original operation result can be obtained as CD*1/D=C.

Abstract: This invention provides a voltage controlled oscillator that improves the linearity of frequency variable characteristics and increases the range of frequency that can be varied by a control voltage. A resistor circuit is connected between a piezoelectric resonator X and an oscillator circuit. The resistor circuit includes a plurality of oscillation-amplitude adjusting resistors Rs1 to Rsn and corresponding switches SW1 to SWn. The resistor circuit adjusts the amplitude of oscillation. When a control voltage Vc applied to a varactor Cv is at a low potential, clipping by a forward voltage of the varactor Cv is suppressed, and the frequency is linearly changed by the control voltage Vc within a range of a low potential to a high potential.

Abstract: An object of the present invention is to prevent secret information that is being internally processed from being inferred through operational information of a secured device, including the current consumption information. One solution is provided by an information processing device having at least a key generation apparatus that generates key data automatically, an encryption unit that encrypts data with the corresponding key data, a register that stores a plurality of encrypted data items with the corresponding encryption key data items, and an arithmetic unit that performs operations using data expressed with the corresponding encryption key data and new key data as the input, encrypts the operation result with new input key data, and outputs the result, thereby being capable of performing internal processing on an encrypted data expression. Accordingly, only encrypted data is transferred on the internal or external data bus line.

Abstract: An information processing unit and methods therefore which render it more difficult to infer information being processed within an information processing unit by observing the unit's current consumption or electromagnetic radiation. Specifically, the information processing unit preferably encrypts and decrypts data when the data is read from/written to memories within the unit. The encryption/decryption process may include the use of multiple cryptographic keys, permutated data storage locations, randomly generated keys, and permutated data processing steps.