Beijing Z & W Technology Consulting Co., Ltd. Patent applications |
Patent application number | Title | Published |
20120136960 | Cloud Storage Data Access Method, Apparatus and System - This invention relates to technology field of cloud storage and especially relates to a cloud storage data access method. The method comprises: a step of data storing and a step of data retrieving. The data storing step comprises: converting a file to be stored into a group of data blocks to form a physical part of the file, saving a logical part of the file, which is formed by information of restoring the physical part back to original file; distributing the physical part to multiple cloud storage data centers for storage; and saving storing location information of the data blocks of the physical part in the cloud storage data centers in the logical part; the step of data retrieving comprises: acquiring the file's logical part according to a file access request; retrieving the physical part of the file from at least one of the cloud storage data centers according to the logical part information and restoring the physical part to the original file according to the logical part information. This invention also provides a cloud storage data access apparatus and system. This invention improves cloud storage data access performance, facilitates storage space saving, increases data transmission bandwidth, and strengthens data security. | 05-31-2012 |
20120136836 | Cloud Storage Data Storing and Retrieving Method, Apparatus and System - The present application relates to cloud storage technology and especially relates to a cloud storage data store and retrieval method, apparatus and system. The data storing method comprise grouping source data to be stored according to a predetermined grouping rule; reorganizing the content of the grouped source data to form new data; transmitting the new data to a cloud storage data center for storage. The data retrieval method comprises, as requested, retrieving the data from a cloud storage data center; acquiring data recovery information corresponding to the data; restoring the data to source data according to the data recovery information. This application also provides a cloud storage data storing and retrieving apparatus and system. This invention can improve the data security of cloud storage and mitigate the risk of user data illegal leak and decryption. | 05-31-2012 |
20120134495 | Cloud Storage Data Access Method, Apparatus and System Based on OTP - The present application relates to cloud storage technology and especially relates to a cloud storage data access method, apparatus and system based on OTP. This method includes: generating and storing true random numbers of a predetermined length and a random seed of a predetermined length composed of the true random numbers via a preset method; acquiring data from the random seed for several times and cascading the data acquired each time into a true random data string of no shorter than the length of plaintext; based on the true random data string, generating a true random cryptographic key of no shorter than the length of the plaintext, encrypting the plaintext using this cryptographic key and transmitting ciphertext to a cloud storage data center. This application also provides a cloud storage data access apparatus and system based on OTP. The method, apparatus and system introduced by this invention can generate and store sufficient true random cryptographic key with relatively small physical space occupancy in comparison with that of plaintext, thereby enabling OTP to be applied into cloud storage data security protection. | 05-31-2012 |
20120134494 | Data Control Method of Cloud Storage - The present application relates to the field of technology of cloud storage data security, and in particular, relates to a data control method of cloud storage. The method comprises: converting the original data by a preset method into irreversible data blocks to form a physical part of the original data, and storing it in the cloud storage data center; outputting information necessary for data restoration of the process of converting the original data to the physical part, as a logical part of the original data, and storing the logical part of the original data in an original data owner controlled storage media. In this invention, the original data to be stored is converted into the physical part, which is then stored in a cloud storage data center. The logical part of the original data required for restoring the physical part to the original data is controlled by owners of the original data. Therefore, the original data owners can control the physical part of data, which physically occupies a large space by controlling the logical part, which physically occupies a small space and therefore, control their data in a cloud storage data center. | 05-31-2012 |
20120134491 | Cloud Storage Data Encryption Method, Apparatus and System - This present application relates to the field of cloud storage security technology, and in particular, relates to a cloud storage data encryption method, apparatus and system. The method comprises: according to the amount of data X expected to be stored within the preset time, the proportion of local storage space R and the security level of data Z, calculating the size H of a random seed that should be generated; according to the amount Y of plaintext data every time, calculating the times u of random seed acquired; according to the times u, acquiring data from the generated random seed with the size of H for several times to generate a plaintext encryption bit identifier data string; by use of the data string, selecting more than one half of the plaintext data for encryption to form a ciphertext. This application also provides a cloud storage data encryption apparatus and system. This invention has reduced the amount of encrypted data to be stored without sacrifice in the degree of data security protection, thus greatly improves the cloud storage data encryption and decryption performance. | 05-31-2012 |
20120134490 | Selective Data Encryption and Decryption Method and Apparatus - This present application relates to the field of data encryption and decryption technology, and in particular, relates to a selective data encryption and decryption method and apparatus. The encryption method includes: generating a string of true random numbers 0, 1 of a predetermined length via the preset method as a random seed; acquiring data for several times from the random seed, and cascading the data acquired each time into a random string no shorter than the length of a plaintext; according to the random string, generating a plaintext encryption bit identifier random string; randomly selecting more than one half of plaintext data for encryption according to the plaintext encryption bit identifier random string; arranging the encrypted data and unencrypted data to form a ciphertext according to their positions of the plaintext. The encryption apparatus includes: true random number generation module, encryption bit identifier random string generation module, plaintext selectivity encryption module and ciphertext formation module. This application also provides a selective data decryption method and apparatus. This invention reduces the amount of data to be encrypted or decrypted, thus improves the data encryption and decryption performance. | 05-31-2012 |