Abstract: A data authenticity proving system calculates a hash value A and a hash value B from an evidence data transmitted from a terminal device at respectively different timings, and, when the hash value A and the hash value B are the same, registers the evidence data by storing the evidence data in a storage device. In case that the evidence data has been tampered with during a time between a timing of receiving the evidence data from the terminal device and a timing of registering the evidence data in the storage device, the hash value A and the hash value B take respectively different values, thereby registration of the evidence data will not be performed.

Abstract: In one embodiment, an electronic device includes a power supply circuit that has a first switch circuit between a power supply line and a ground potential. The first switch circuit connects the power supply line to the ground potential upon receipt of a control signal that is supplied when a supply of power on the power supply line is cut off. A capacitor is connected between the power supply line and the ground potential. A second switch circuit is between the capacitor and the power supply line. The second switch circuit is configured to disconnect the capacitor from the power supply line upon receipt of the first control signal. A controller circuit is configured to supply the first control signal when the supply of power on the power supply line is cut off.

Abstract: In one embodiment, an electronic device includes a power supply circuit that has a first switch circuit between a power supply line and a ground potential. The first switch circuit connects the power supply line to the ground potential upon receipt of a control signal that is supplied when a supply of power on the power supply line is cut off. A capacitor is connected between the power supply line and the ground potential. A second switch circuit is between the capacitor and the power supply line. The second switch circuit is configured to disconnect the capacitor from the power supply line upon receipt of the first control signal. A controller circuit is configured to supply the first control signal when the supply of power on the power supply line is cut off.

Abstract: A semiconductor device includes a board having a solder resist layer with first and second openings on a first surface, and a first electrode on the first surface, a portion thereof exposed in the first opening and electrically connected to the board. A second electrode is located on the first surface having a portion exposed in the second opening and electrically connected to the board. A portion of the second electrode is covered by the solder resist layer. A first solder bump is on the first electrode and covers a side surface. A second solder bump is on the second electrode. A semiconductor chip has a first region and a second region facing the first surface. A third electrode is in the first region and electrically connected to the first solder bump. A fourth electrode is in the second region and electrically connected to the second solder bump.

Abstract: A semiconductor device includes a board having a solder resist layer with first and second openings on a first surface, and a first electrode on the first surface, a portion thereof exposed in the first opening and electrically connected to the board. A second electrode is located on the first surface having a portion exposed in the second opening and electrically connected to the board. A portion of the second electrode is covered by the solder resist layer. A first solder bump is on the first electrode and covers a side surface. A second solder bump is on the second electrode. A semiconductor chip has a first region and a second region facing the first surface. A third electrode is in the first region and electrically connected to the first solder bump. A fourth electrode is in the second region and electrically connected to the second solder bump.

Abstract: A monitoring method for monitoring a video/audio signal transmitted from a transmission source to a transmission destination has a step of storing the video/audio signal transmitted from the transmission source to the transmission destination repeatedly for a predetermined time period, a step of comparing a first characteristic amount extracted from the video/audio signal before the transmission and a second characteristic amount extracted from the video/audio signal after the transmission in real time, a step of determining an error occurrence when there is a difference of a predetermined value or more between the first characteristic amount and the second characteristic amount, and a step of transmitting the stored video/audio signal to a predetermined destination when an error occurrence is determined.

Abstract: A monitoring method for monitoring a video/audio signal transmitted from a transmission source to a transmission destination has a step of storing the video/audio signal transmitted from the transmission source to the transmission destination repeatedly for a predetermined time period, a step of comparing a first characteristic amount extracted from the video/audio signal before the transmission and a second characteristic amount extracted from the video/audio signal after the transmission in real time, a step of determining an error occurrence when there is a difference of a predetermined value or more between the first characteristic amount and the second characteristic amount, and a step of transmitting the stored video/audio signal to a predetermined destination when an error occurrence is determined.

Abstract: A monitoring method for monitoring a video/audio signal transmitted from a transmission source to a transmission destination has a step of storing the video/audio signal transmitted from the transmission source to the transmission destination repeatedly for a predetermined time period, a step of comparing a first characteristic amount extracted from the video/audio signal before the transmission and a second characteristic amount extracted from the video/audio signal after the transmission in real time, a step of determining an error occurrence when there is a difference of a predetermined value or more between the first characteristic amount and the second characteristic amount, and a step of transmitting the stored video/audio signal to a predetermined destination when an error occurrence is determined.

Abstract: A monitoring system checks a transmission error of a video/audio signal transmitted from a source (10) to a destination (20A, 20B) by comparing in real time a first feature extracted from the pre-transmission video/audio signal and a second feature extracted from the post-transmission video/audio signal. The transmitted video/audio signal is repeatedly stored for a predetermined period of time. When the system judges that a transmission error has occurred, it transmits the stored video/audio signal to a predetermined address. Thus, the transmission error of the transmitted video/audio signal can be analyzed rapidly and in detail.

Abstract: A video/audio signal transmitted from a transmission source 10 to transmission destinations 20A and 20B is stored repeatedly for a predetermined time period. Thus, for example if the video/audio signal is overwritten at predetermined timing, it is sufficient to have a small storage capacity for the video/audio signal. Also, the video/audio signal on which an error has occurred remains without being overwritten at the time of determination that an error has occurred. Accordingly, by transmitting this signal to a predetermined destination, a detailed error analysis can be made promptly on the basis of the transmitted video/audio signal.