The invention relates to a cloud platform
privacy protection method based on frequent item retrieval. The cloud platform
privacy protection method comprises the steps of extracting a frequent item set of data according to an association rule
algorithm; establishing a frequent item model
library by performing parallel retrieval on multiple key words; sorting retrieval results by means of a parallel distributed
sorting algorithm to find sensitive records; performing difference
privacy protection on the sensitive records on a cloud platform through a clustering
algorithm. According to conditions of frequent items of the data, the sensitive records revealing
user information are retrieved, and difference privacy protection is performed on the sensitive records in a targeted mode. Therefore, relevant sensitive information cannot be speculated according to known non-sensitive information. By means of the cloud platform privacy protection method based on frequent item retrieval, the sensitive records are protected only, other information contents are not affected, therefore, data leakage risk is reduced while effectiveness of published data is increased, and safety of the data on the cloud platform is ensured.