202results about How to "Avoid storage problems" patented technology

The invention provides a method for reducing identification of chunk portions in data de-duplication. The method includes detecting sequences of stored identification of chunk portions of at least one data object, indexing the detected stored identification of chunk portions based on a sequence type, encoding first repeated sequences of the stored identifications with a first encoding, encoding second repeated sequences of the stored identifications with a second encoding, and avoiding repeated stored identifications of chunk portions.

A method and corresponding apparatus and computer-readable medium to effect maintenance and / or purging of a document file in a multi-user document of file management system operating over a network. The document management system stores all document files in encrypted form. An exemplary method to assure full and complete purging of a document comprises generating an encryption key for the document, storing the encryption key in a central key storage accessible over the network by multiple users, producing an encrypted version of the document using the encryption key, storing the encrypted document in a central file storage medium, enabling a user to retrieve the document using the encryption key to decrypt the encrypted document when accessing the central file storage medium, and when necessary purging all copies of the document from the document management system by purging or deleting the encryption key.

One of the various aspects of the invention is related to suggesting various techniques for improving the tamper-resistibility of hardware. The tamper-resistant hardware may be advantageously used in a transaction system that provides the off-line transaction protocol. Amongst these techniques for improving the tamper-resistibility are trusted bootstrapping by means of secure software entity modules, a new use of hardware providing a Physical Unclonable Function, and the use of a configuration fingerprint of a FPGA used within the tamper-resistant hardware.

The present invention provides a data processing apparatus and method for managing access to a memory within the data processing apparatus. The data processing apparatus comprises a processor operable in a plurality of modes and a plurality of domains, said plurality of domains comprising a secure domain and a non-secure domain, said plurality of modes including at least one non-secure mode being a mode in the non-secure domain and at least one secure mode being a mode in the secure domain, said processor being operable such that when executing a program in a secure mode said program has access to secure data which is not accessible when said processor is operating in a non-secure mode. Further, a memory is provided for storing data required by the processor, and consists of secure memory for storing secure data and non-secure memory for storing non-secure data. The memory further contains a non-secure table and a secure table, the non-secure table being within the non-secure memory and arranged to contain for each of a number of first memory regions an associated descriptor, and the secure table being within the secure memory and arranged to contain for each of a number of second memory regions an associated descriptor. When access to an item of data in the memory is required by the processor, the processor issues a memory access request, and a memory management unit is provided to perform one or more predetermined access control functions to control issuance of the memory access request to the memory. The memory management unit comprises an internal storage unit operable to store descriptors retrieved by the memory management unit from either the non-secure table or the secure table, and in accordance with the present invention the internal storage unit comprises a flag associated with each descriptor stored within the internal storage unit to identify whether that descriptor is from the non-secure table or the secure table. By this approach, when the processor is operating in a non-secure mode, the memory management unit is operable to perform the predetermined access control functions for the memory access request with reference to access control information derived from the descriptors in the internal storage unit retrieved from the non-secure table. In contrast, when the processor is operating in a secure mode, the memory management unit is operable to perform the predetermined access control functions for the memory access request with reference to access control information derived from the descriptors in the internal storage unit retrieved from the secure table. This approach enables different descriptors to be used for the control of accesses to memory in either the secure domain or the non-secure domain, whilst enabling such different descriptors to co-exist within the memory management unit's internal storage unit, thereby avoiding the requirement to flush the contents of such an internal storage unit when the operation of the processor changes from the secure domain to the non-secure domain, or vice versa.

A switched file system, also termed a file switch, is logically positioned between client computers and file servers in a computer network. The file switch distributes user files among multiple file servers using aggregated file, transaction and directory mechanisms. The file switch distributes and aggregates the client data files in accordance with a predetermined set of aggregation rules. Each rule can be modified independently of the other rules. Different aggregation rules can be used for different types of files, thereby adapting the characteristics of the switched file system to the intended use and to the expected or historical access patterns for different data files.

The invention concerns a method for adjusting a seat for a motor vehicle on the basis of measurements of a user, wherein said measurements are taken from a touch screen (42) of a device (4) provided with an imaging camera (44), the length of measuring templates superposed on an image of the user being adapted to correspond to the image.

One of the various aspects of the invention is related to suggesting various techniques for improving the tamper-resistibility of hardware. The tamper-resistant hardware may be advantageously used in a transaction system that provides the off-line transaction protocol. Amongst these techniques for improving the tamper-resistibility are trusted bootstrapping by means of secure software entity modules, a new use of hardware providing a Physical Unclonable Function, and the use of a configuration fingerprint of a FPGA used within the tamper-resistant hardware.

An other vehicle information providing device, can be configured to assign priority to a plurality of other vehicle information inputted to the own vehicle and provides other vehicle information having high priority. The other vehicle information providing device includes a priority memory means for storing priority information. An information switching index value calculation means which predicts future priority after a lapse of a predetermined period based on the stored priority information, which can include latest priority and priority previous to the latest priority, and calculates an information switching index value based on the latest priority, the priority previous to the latest priority, the priority before the priority previous to the latest priority and the future priority. An information providing means provides other vehicle information based on the information switching index value.