129results about "Digital data protection" patented technology

A system and method are provided for retention of data on a storage system. An application program provides the storage system with data to be stored on the storage system. The application program also provides the storage system with a retention period that indicates a period of time for which the data may not be deleted. When the storage system receives a request to delete the data, it first evaluates the retention period associated with that data to determine if the retention period has expired. If the retention period has not expired, the storage system denies the request to delete the data.

The invention discloses a (k,n) threshold based user-friendly visual secret sharing method and mainly solves the problems of low security and contrast in the prior art. The method is implemented by the steps of 1, performing (k,n) random grid processing on a binary secret image S to obtain n basic shared images of random grids; 2, performing block segmentation on an input gray cover image by using histogram equalization to obtain a gray level equivalent to the gray level of each small image block; 3, performing halftone processing on the cover image subjected to the block segmentation, and according to a generated dithering matrix, obtaining a shared cover image after the halftone processing; and 4, performing block segmentation on the generated basic shared images and cover image, performing combination according to a stacking ratio of a constant value delta, and performing block segmentation and combination to generate a meaningful final shared image. According to the method, the attack of attackers can be prevented, the meaningful final shared image can be generated, and the application range of visual secret sharing can be extended.

The invention discloses a reading method and device for verification information. The method comprises the steps that a safety APP strategy is set on a terminal for reading the verification information, wherein the verification information is a message used for verifying the identity or authority of a terminal or a user in a specific service execution process; after the terminal receives the verification information from a network device, application programs request to obtain the verification information; whether the application programs accord with the safety APP strategy is judged, and according to the judgment result, only the application programs according with the safety APP strategy are allowed to read the verification information; and the verification information is utilized to verify the identity or authority of the terminal or the user in the specific service execution process. According to the invention, the safety APP strategy is set in advance, only the APPs according with the safety APP strategy are allowed to access the verification information, and malicious application programs such as Trojan cannot read the verification information under the condition that the malicious application programs do not accord with the safety APP strategy, so that the invalid application programs are effectively prevented from stealing the accord with the verification information, and the information safety is ensured.

The invention provides a method and a system used for refining database authority. The method includes: establishing a data source table according to configuration information of a database of which the authority needs to be refined; acquiring database name information and table information and field information in the database from the configuration information to establish a resource table; creating accessing users, and storing accessing-user information to establish a user table; and establishing relationships of the accessing users and resources in the resource table according to the accessing users and the resources in the resource table, and carrying out storing to establish a user resource relationship table. According to the method, finer control authority can be realized for the database, and security of the database is improved.

The invention discloses a system and a method for transferring medical data, and belongs to the technical field of medical data management. The system is provided and comprises a data acquisition module, a data processing module, an auditing module, a verification module and a security module, and all the modules are electrically connected in sequence. The method for transferring medical data is provided and comprises the following steps that S1, a medical institution calls related medical data according to the content of an application form; S2, the related medical data in the step S1 are classified and standardization and desensitization processing are performed; S3, the data in the step S2 are audited to ensure that the data are consistent with the content of the application form; S4, the patient and the medical institution authorize related medical data; and S5, security protection is performed on the internal and network security of the medical institution to ensure data transmission security. According to the method and the system, privacy, security and standardization of medical data transferring are ensured, and the value of the medical data is improved.

The present application relates to the apparatus for blocking Ransome ware using access control to the contents file, it includes an access permission program checking unit for checking whether a program of a process detected as being started in an user's computer is a reliable program, checking whether a parent process of the program is a reliable program, and determining whether the program is the program that is allowed to access the contents file; a whitelist registration unit for registering information of the contents file to be protected; and a contents file access control unit for allowing the process to access the contents file registered in the whitelist registration unit when the program of the process is the program that is allowed to access the contents file determined by the access permission program checking unit, and blocking the process from accessing the contents file registered in the whitelist registration unit when the program of the process is not the program that is allowed to access the contents file determined by the access permission program checking unit.

A tax system consensus method based on an alliance chain comprises the steps that an alliance chain network is established by a tax supervision institution, a tax registration institution serves as anaccounting node in the alliance chain network, other participation institutions are connected to the accounting nodes in the alliance chain network, and each participation institution and the tax supervision and registration institution are provided with independent databases; a digital protocol and a transaction contract are uniformly formulated by a tax administration mechanism in the alliancechain network; each participation institution realizes digital registration through an alliance chain; and if any participation mechanism in the alliance chain calls the transaction contract, all operation records of the transaction contract are generated into a file, the file and the transaction contract is encrypted by adopting a hash algorithm, the file and the transaction contract are sent tothe accounting node, and the file is stored by a database of each accounting node. According to the tax system consensus method provided by the technical scheme, the economic cost and administrative management cost of the tax department are reduced, the enterprise operation cost is reduced, and information sharing between the enterprise and the tax system is realized.

A distributed computing system is used to form a login network to perform an action for a user, using private data. The login network executes the verification using blockchain computing architecture, which is decentralized. The private data is stored on the blockchain in an obfuscated form. In order to compute the private data from the obfuscated form, multiple distributed private key shares are required to generate multiple decryption shares, which are combined to compute a One Time Pad (OTP). In turn, the OTP is used to obtain the private data from the obfuscated form.