System and method for dynamic generation of anti-virus databases

Disclosed is a computer-implemented system for dynamic generation of anti-virus (AV) databases, the system being part of a server (110) within a server-client environment. The system comprises a server-side AV database (315) containing data related to known malware objects; a request processing module (311) configured for receiving and processing user requests from a user computer (120-128, 210), the user requests comprising data reflecting parameter changes in the user computer (120-128, 210); and a server update module (316). The system is characterized by a user profile database (312) connected to the request processing module (311), the user profile database (312) containing parameter changes which were inserted into the user profile database (312) by the request processing module (311); a data processing module (313) connected to the request processing module (311) and to the user profile database (312), wherein the data processing module (313) is configured to generate requirements for a user-side AV database (216) based on the parameter changes received from the user profile database (312); and by a data selection module (314) configured for receiving the requirements for the user-side AV database (216) from the data processing module (313) and for preparing required data by selecting a subset from the server-side AV database (315) based on the requirements, wherein the server update module (316) is connected to the data selection module (314) and is configured for sending the subset to the user computer (120-128, 210) for updating the user-side AV database (216); wherein the parameter changes comprise changes in a user geographical location; and wherein the subset is the minimal relevant subset required for virus or malware detection on the user computer (120-128, 210) after the parameter changes.