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The simplest security method for protecting the private key is to encrypt it with passwords and to save the encrypted result.
Using sk, the assayer decrypts the encrypted result ct to obtain the desired inner product (sum _{i = 1}^{m} x_{i} cdot y_{i}), which enables the assayer to identify purchase patterns of items X and Y.
Using sk, the assayer decrypts the encrypted result ct to obtain the desired inner product (sum _{i = 1}^{m} x_{i} cdot y_{i}), which enables the assayer to identify purchase patterns of items X and Y. Figure 1 The secret computation model of purchase history data between two companies proposed in [ 23 ].
In general, a framework for protecting the corporate privacy in data mining outsourcing must guarantee: (1) to the data owner the possibility to query its data in outsourcing (2) to the server provider to answer the queries of the data owner with an encrypted result that does not allow to infer any knowledge (3) to the data owner to recover the query results within a quantifiable approximation.
At a later stage, the encrypted result of the processing can be decrypted to disclose the result.
Then the cloud computes the inner product mathsf{ct} = sum_{i = 1}^{m} mathsf{Enc}(x_{i}) cdot mathsf{Enc} y_{i}) (1) on encrypted data (note that ct is the ciphertext of the inner product (sum _{i = 1}^{m} x_{i} cdot y_{i}) due to homomorphic property), and only sends the encrypted result ct to the assayer.
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Lattice cryptology enabled homomorphic encryption, allowing computers to analyze encrypted data and return encrypted results without ever being able to decode the information.
DU: This party only receives the encrypted results of secure computation from (P_i (1le ile p)).
A search engine, for instance, could accept encrypted search terms, scan the Web for results based on those scrambled words, and return encrypted results for the user to decode without ever seeing what he or she was searching for.
(P_i (1le ile n)): Each party receives encrypted RVs of blocks and sends the encrypted results of secure computation to the DU.
After decrypting the encrypted results with private key, the real results only show the final results without revealing the specific information from each part.
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com