ESET SMART SECURITY 4 - QUICK START GUIDE FOR MICROSOFT WINDOWS 7-VISTA-XP-2000-2003-2008 Podręcznik Użytkownika Pobierz pdf (Strona 124)

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6.3.4.4 Server-side control

Server-side control is a technique for identifying mass spam based on the number of received messages and the

reactions of users. Each message leaves a unique digital “footprint” based on the content of the message. The unique ID

number tells nothing about the content of the email. Two identical messages will have identical footprints, while

different messages will have different footprints.

If a message is marked as spam, its footprint is sent to the server. If the server receives more identical footprints

(corresponding to a certain spam message), the footprint is stored in the spam footprints database. When scanning

incoming messages, the program sends the footprints of the messages to the server. The server returns information on

which footprints correspond to messages already marked by users as spam.

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