초록 ▼

A security mediator system is used in a computer system having a database of information to be shared with authorized users in accordance with pre-defined constraints. A rules database stores rules, including query pre-processing rules and query results post-processing rules. The rules database incl

A security mediator system is used in a computer system having a database of information to be shared with authorized users in accordance with pre-defined constraints. A rules database stores rules, including query pre-processing rules and query results post-processing rules. The rules database includes data for specifying, for each of a plurality of specified groups of users, which of the rules in the rules database are applicable to queries received from users in each of the groups. A query pre-processing module applies to each received query all pre-processing rules in the rules database applicable to the query in accordance with the identified user who submitted the query. If any applicable rule is not passed, the query is blocked; otherwise execution of the query is enabled. A database access module executing each enabled query to produce a corresponding result. A post-processing module applies to the results all post-processing rules in the rules database applicable to the executed query. If any applicable rule is not passed, transmission of the results is blocked; otherwise transmission of the results to the identified user is enabled. A security officer module processes blocked queries and blocked results, enabling a security officer to review blocked queries and blocked results, and to either confirm the blocking determination or override it.

대표청구항 ▼

[ What is claimed is:] [1.]1. A security system for use in a computer system having a database of information to be shared with authorized users in accordance with pre-defined constraints, comprising:a port for receiving queries requesting information from the database;means for accessing a set of r

[ What is claimed is:] [1.]1. A security system for use in a computer system having a database of information to be shared with authorized users in accordance with pre-defined constraints, comprising:a port for receiving queries requesting information from the database;means for accessing a set of rules, including query pre-processing rules and query results post-processing rules; each query pre-processing rule specifying one or more conditions that must be satisfied by any query to which the rule is applicable; each results post-processing rule specifying one or more conditions that must be satisfied by any results to which the rule is applicable;a query pre-processing module for applying to each received query all pre-processing rules applicable to the query, for blocking further processing of the query if any of the pre-processing rules applied to the received query are not passed, and for otherwise enabling execution of the received query by a database access mechanism so as to extract information from the database as specified in the query to produce a corresponding result having one or more words; anda post-processing module for applying to the result produced for each executed query all post-processing rules applicable to the result, for blocking transmission of the results if any of the post-processing rules applied to the results are not passed, and for otherwise enabling transmission of the results;wherein the post-processing rules include at least one rule that compares every word of the result with a predefined dictionary of words, and the post-processing module blocks transmission of the result if the result includes any words not in the predefined dictionary of words.