Abstract: Disclosed herein are a blockchain-based video integrity verification system and method. The blockchain-based video integrity verification system includes: a blockchain system including a plurality of distributed nodes configured to store video integrity-related information; and a video management server including an integrity checking unit configured to perform an integrity check of an original video received from a user terminal, and a blockchain communication unit configured to transmit video integrity-related information, including information about the result of the integrity check and the hash value of the original video, to the blockchain system.

Abstract: Provided are an apparatus and method for verifying the integrity of a video file. The method includes receiving a video file and model information of a video recording device which is claimed to have recorded a verification-target video, extracting a header structure and a header value of the video file, extracting characteristic information according to the received model information of the video recording device from a characteristic database, and determining whether the extracted characteristic information according to the model information of the video recording device corresponds to the header structure and the header value of the video file.

Abstract: Provided are an apparatus and method for verifying the integrity of a video file. The method includes receiving a video file and model information of a video recording device which is claimed to have recorded a verification-target video, extracting a header structure and a header value of the video file, extracting characteristic information according to the received model information of the video recording device from a characteristic database, and determining whether the extracted characteristic information according to the model information of the video recording device corresponds to the header structure and the header value of the video file.

Abstract: A device for integrity verification of image data. The device comprises: a database configured to store multiple field signatures respectively corresponding to multiple editing tools; a memory configured to store a program for integrity verification of image data; and a processor configured to execute the program stored in the memory. The processor: extracts a field from the image data when the program is executed; determines whether or not there is a field signature matched with the extracted field from among the multiple field signatures; and determines whether or not the image data are edited depending on a result of the determination.

Abstract: A device for integrity verification of image data. The device comprises: a database configured to store multiple field signatures respectively corresponding to multiple editing tools; a memory configured to store a program for integrity verification of image data; and a processor configured to execute the program stored in the memory. The processor: extracts a field from the image data when the program is executed; determines whether or not there is a field signature matched with the extracted field from among the multiple field signatures; and determines whether or not the image data are edited depending on a result of the determination.

Abstract: Energy-efficient multi-core processor systems are provided. A multi-core processor may include a plurality of processor cores configured to process a task in parallel and at least one of a lowest voltage level and a lowest clock frequency among available voltage levels and clock frequencies is chosen to enable the selected processor cores to complete a task within a task deadline.

Abstract: When interworking two or more networks, such as a wireless local access network (WLAN) and a mobile communication network, user billing and service charging should be accurately collected and processed. To do so, certain types of service usage and charging information for certain users can be deleted depending upon the type of service provided to the user. Also, service usage and charging information can be periodically collected depending upon the type of service being provided. Furthermore, WLAN wireless access service usage and charging information, as well as mobile communication network service charging information can be collected upon correlation therebetween.

Abstract: When interworking two or more networks, such as a wireless local access network (WLAN) and a mobile communication network, user billing and service charging should be accurately collected and processed. To do so, certain types of service usage and charging information for certain users can be deleted depending upon the type of service provided to the user. Also, service usage and charging information can be periodically collected depending upon the type of service being provided. Furthermore, WLAN wireless access service usage and charging information, as well as mobile communication network service charging information can be collected upon correlation therebetween.