US 12,223,078 B2
Method to use privacy protection query language PQL to improve the security of shared date
Xiang Wu, Jiangsu (CN); Huanhuan Wang, Jiangsu (CN); Lian Liu, Jiangsu (CN); Ruirui Li, Jiangsu (CN); Yu Chen, Jiangsu (CN); and Jingyuan Wang, Jiangsu (CN)
Filed by Xiang Wu, Jiangsu (CN); Huanhuan Wang, Jiangsu (CN); Lian Liu, Jiangsu (CN); Ruirui Li, Jiangsu (CN); Yu Chen, Jiangsu (CN); and Jingyuan Wang, Jiangsu (CN)
Filed on Jan. 7, 2021, as Appl. No. 17/143,182.
Prior Publication US 2022/0100887 A1, Mar. 31, 2022
Int. Cl. G06F 21/62 (2013.01); G06F 16/242 (2019.01); G06F 16/2455 (2019.01)
CPC G06F 21/6227 (2013.01) [G06F 16/2433 (2019.01); G06F 16/2455 (2019.01); G06F 21/6245 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method to use privacy protection query language (PQL) to improve the security of shared data, comprising the following steps:
Step 1: a user inputs a PQL statement according to predetermined semantic and syntactic rules and sends the PQL statement to a parsing module, wherein the PQL statement comprises: a PROTECT clause, a PICK clause, a WITH clause, a WITHRANGE clause, a GLOBAL clause, and a WHERE clause, wherein the parsing module comprises a lexical analyzer and a syntactic analyzer, wherein the PQL statement is checked for errors through the lexical analyzer, and correct results are sent to the syntactic analyzer, otherwise, incorrect contents are pointed out;
Step 2: the syntactic analyzer performs grammatical and semantic checks on the PQL statement, generates a mapping table and a parameter table with correct results of the grammatical and semantic checks, and sends the mapping table and the parameter table to a query module and a noise-injection module respectively, otherwise, incorrect contents are pointed out; and
Step 3: after receiving the mapping table, the query module encapsulates the mapping table into a SQL statement, said SQL statement is connected to a database for query, and final query results are sent to the noise-injection module.