Verifiable range query method based on ciphertext spatio-temporal data
A technology of spatiotemporal data and query methods, which is applied in database indexing, digital data protection, electronic digital data processing, etc. The effect of range queries
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[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0032] see figure 1 , the verifiable range query method based on ciphertext spatio-temporal data of the present invention mainly includes the following aspects:
[0033] First, the data owner uses the AES encryption algorithm to encrypt the plaintext space-time data. Second, the two-dimensional spatio-temporal data is used to construct an index tree according to the G-tree. Each parent node corresponds to four child nodes, and each node corresponds to a quadrilateral range. Using the Hierarchical cell based encoding algorithm, the lower left and upper right points of each quadrilateral are converted into a series of prefix sets, and the prefix sets corresponding to the lower left and upper right points of each quadrilateral are encrypted and stored in the accumulator to obtain a G-tree index structure. Third, the query user converts the query range request...
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