53 One approach suggested to ensure privacy is the small res

53. One approach suggested to ensure privacy is the small result rejection, in which the system rejects (returns no result from) any query, the result of which is derived from a small number, for example, five, of records. Show how to obtain sensitive data by using only queries derived from six records.

Solution

One way would be to check required number of records before displaying the result in the UI. This process would be easier as we are not required to change our existing sql and also faster as there is no linkage to aggregate result.