Abstract: Embodiments provide a method and device for distributing an electronic document. The electronic document possesses first authorized copies information used to record a first number of authorized copies for the electronic document a local user may distribute. Every time the electronic document is distributed to a user, second authorized copies information is sent to the user, which second authorized copies information is used to record a second number of authorized copies for the electronic document the user may distribute, and the second number of authorized copies is less than or equal to the first number of authorized copies currently recorded in the first authorized copies information.

Abstract: Embodiments of the present invention disclose a cloud storage method and device, to provide efficient storage of huge amounts of data. The cloud storage method includes: calculating the hash value of a file, converting the hash value of the file into the string, and using the string as the filename; calculating the storage path of the file by using the hash value of the file according to a predefined rule; looking up a physical storage location of the storage path of the file in an index table and storing the file in the physical storage location, wherein the index table stores corresponding relationship tables between all possible storage paths and physical locations in the storage disk in advance.

Abstract: The present invention discloses a method for processing document data, wherein the document data comprises at least one page in order and the page comprising at least one layer in order, the method comprises: managing and controlling the at least one layer respectively. The technical scheme of the present invention enables process a document on layers in the docbase management system and provides more flexible document processing.

Abstract: The present invention discloses a security control method of network storage to ensure that the unencrypted data cannot be figured out from all information stored on the server. The method includes: encrypting, the private key of a user using a user credential and storing the encrypted private key in a server; encrypting data using a storage key, when uploading the data to the server, encrypting the decryption key corresponding to the storage key using the public key of the user, and submitting the encrypted data and the encrypted decryption key to the server.

Abstract: The present invention discloses a docbase management system and a method for extending docbase management system functions. The method includes: determining an extended function module which matches extended data, wherein, the extended function module is compatible with a system extension interface in a docbase management system; invoking, through the system extension interface of the docbase management system, the determined extended function module to process the extended data. The method provided by the present invention enables the docbase management system functions to be extended without recompiling the docbase management system.

Abstract: A multi-granularity parallel FFT computation device including three memories, a butterfly computation device, a state control unit, a data reversing network and a first selector. The three memories are each a multi-granularity parallel memory, and store butterfly group data and twiddle factors corresponding to the butterfly group data. The butterfly computation device perform computations of a butterfly group based on the butterfly group data outputted from the first selector and the corresponding twiddle factors outputted from one of the memories, and write a computation result back to the other two memories. The device can read butterfly group data and corresponding twiddle factors in parallel from the multi-granularity parallel memories with a specific R/W granularity. No memory conflict will occur in the read operation, and no additional process is required for sorting the read/written data.

Abstract: A parallel bit reversal device and method. The device includes a parallel bit reversal unit, a butterfly computation and control unit, and a memory. The butterfly computation and control unit is coupled to the memory via a data bus. The parallel bit reversal unit is configured to bit-reverse butterfly group data used by the butterfly computation and control unit. The parallel bit reversal unit includes an address reversing logic coupled to the butterfly computation and control unit, and configured to perform mirror reversal and right-shift operations on a read address from the butterfly computation and control unit.

Abstract: A multi-granularity parallel storage system and memory that support parallel read/write of rows and columns in multiple granularities. The storage system includes a R/W port and a memory. The memory includes W memory blocks and a data gating network. Each of the memory blocks is a 2D array consisting of multiple memory units and each memory row of the 2D array includes W memory units. For each memory block, one memory row can be read/written at a time, W is the nth power of 2, and n is a natural number. The storage system can support parallel read/write of matrix row and column data of different data types at the same time, and thus essentially eliminate the need for a transposition operation in signal processing and improve efficiency of signal processing.

Abstract: The present invention discloses a storage method. When User A uploads data X to a server which has not been stored in the server, the method includes: calculating a storage encryption key ekS and corresponding decryption key dkS based on data X and a pre-determined algorithm; encrypting the data X with ekS to obtain encrypted data Y, and uploading the data Y to a server; encrypting dkS with ekA which is an encryption key ekA for User A to obtain User A's personal key kA and submitting the kA to the server.

Abstract: A software platform and a method for processing unstructured data are provided. The software platform includes a server and a client The client is configured to receive a predefined command from an application software, call a function which is corresponding to the predefined command and which is in the client and/or in a server through network communications with the server to perform an operation: and the server is configured to perform network communications with the client and provide the function when called by the client. According to the present invention, function loads can be distributed reasonably between the server and the client and each function module can be deployed reasonably, and thereby the working efficiency of the software platform can be improved. Meanwhile, the software platform is extended to he applied to a network, which provides a foundation and convenience for other applications based on the software platform in the network.

Abstract: The present invention discloses a system of processing document data for document interoperation, comprising an application, embedded in a machine readable medium, which initiates an operation on a document by issuing instruction(s) describing the operation to a platform software; the said platform software, embedded in a machine readable medium, which performs the operation on the unstructured data according to the instruction(s); wherein the instruction conforms to an interface standard independent of the format of the unstructured data.

Abstract: The present invention provides a method, system, login device, and application software unit for logging in to a document management system. the method includes: establishing a login device which has a unified invocation interface; invoking, by a user, the login device via an application software unit, wherein the application software unit invokes the login device via the unified invocation interface; returning, by the login device, to the application software unit, access information of a role corresponding to the user achieved after successfully logging in the document management system; accessing, by the application software unit, the document management system by using the access information.

Abstract: The present invention provides a content reading system and method, which gives consideration to both the flexibility of reading method and the security of copyright protection. The content reading system includes: a Document Management System DCMS server, adapted to support the storage and parsing of data content; invoke stored page data and provides the page data to a dedicated client after receiving a page data request from the dedicated client; invoke stored page data to form bitmap of the page and provides the bitmap to a Web client after receiving a page data request from a Web client.

Abstract: The present invention discloses a storage method, system and apparatus. The method comprises: encrypting data with a storage key to obtain encrypted data; encrypting the storage key with two different encryption methods to generate a personal key and a data key, respectively, wherein the personal key can be decrypted with a key from the user who owns the data to obtain the storage key, and the data key can be decrypted with the unencrypted data to obtain the storage key; saving the encrypted data, personal key and data key in a server. The technical scheme of the present invention can prevent saving duplicate files while ensuring that the unencrypted data cannot be accessed by any other users and storage service providers.

Abstract: The present invention discloses a storage method, system and apparatus. The method comprises: encrypting data with a storage key to obtain encrypted data; encrypting the storage key with two different encryption methods to generate a personal key and a data key, respectively, wherein the personal key can be decrypted with a key from the user who owns the data to obtain the storage key, and the data key can be decrypted with the unencrypted data to obtain the storage key; saving the encrypted data, personal key and data key in a server. The technical scheme of the present invention can prevent saving duplicate files while ensuring that the unencrypted data cannot be accessed by any other users and storage service providers.

Abstract: A novel method is disclosed for detecting hidden information in a document comprising characters, including: determining layout transformation for each character in the document for detection compared with the original document; obtaining a code sequence embedded in the document for detection based on the layout transformation of each character in the document for detection and the predetermined embedding rule; decoding the code sequence to get the hidden information embedded in the document for detection.

Abstract: The present invention discloses a method and an apparatus for processing a document conforming to a docbase standard. The method includes: obtaining contents of a document conforming to a docbase standard via a docbase standard interface; generating an interim document which is in a format supported by a third-party software, and saving the contents of the document into the interim document as at least one embedded object and/or image; and providing the interim document for the third-party software for displaying. According to the method and the apparatus provided by the present invention, third-party software is able to process documents conforming to the docbase standard without any change.

Abstract: The present invention discloses a system for document security control to improve the security of document data, and the system comprises: an application, embedded in a machine readable medium, which performs a security control operation on abstract unstructured information by issuing an instruction to a platform software; the platform software, embedded in a machine readable medium, which accepts the instruction from the application and performs the security control operation on storage data corresponding to the abstract unstructured information; wherein, said abstract unstructured information are independent of a way in which said storage data are stored.

Abstract: A system of accessing a copy-prevented encrypted data file transmitted over a network includes a server apparatus having data files; and a client apparatus comprising a read apparatus and a temporary storage. A data file in a server apparatus is accessed through the network from the client apparatus and cached in the temporary storage, and the data file cached in the temporary storage is obtainable by the read apparatus for human recognition of the content of the data file. The read apparatus is not capable of at least one of printing and saving as. The present invention also provides a method of accessing a copy-prevented encrypted data file from a server apparatus. The system and method improve data file transmission security and decrease the possibility of copying and decrypting the data file.

Abstract: The present invention discloses a method and apparatus for privilege control to provide comprehensive privilege control with fine granularity. Document data stored in the docbase management system includes at least one document data object, and the at least one document object supports at least one privilege. When setting a privilege for a role over a document data object, a privilege is selected from the at least one privilege supported by the document data object, and the selected privilege is set as the privilege of the role over the document data object. When the role is to perform an operation on the document data object, the operation of the role on the document data object is controlled according to the privilege of the role over the document data object.