Fingerprinting is an advanced form of spam prevention deployed at the server/provider level. The algorithms work in two primary ways: email body fingerprinting and email attachment fingerprinting. The pattern of language, links, and other content in the body of a spam email can be used to create a fingerprint that is used to analyze other future spam emails and prevent the spam for arriving in your inbox. Fingerprint algorithms are also used to analyze the content of attachments to detect malicious files (including those that have had their names and extensions changed from previously observed files).
- By Jason Fitzpatrick on 11/22/13