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-Vipul's Razor is a distributed, collaborative, spam detection and
-filtering network. Razor establishes a distributed and constantly
-updating catalogue of spam in propagation. This catalogue is used
-by clients to filter out known spam. On receiving a spam, a Razor
-Reporting Agent (run by an end-user or a troll box) calculates and
-submits a 20-character unique identification of the spam (a SHA
-Digest) to its closest Razor Catalogue Server. The Catalogue Server
-echos this signature to other trusted servers after storing it in its
-database. Prior to manual processing or transport-level reception,
-Razor Filtering Agents (end-users and MTAs) check their incoming mail
-against a Catalogue Server and filter out or deny transport in case of
-a signature match. Catalogued spam, once identified and reported by a
-Reporting Agent, can be blocked out by the rest of the Filtering Agents
-on the network.
+Vipul's Razor is a distributed, collaborative, spam detection and
+filtering network. Through user contribution, Razor establishes a
+distributed and constantly updating catalogue of spam in propagation that
+is consulted by email clients to filter out known spam. Detection is done
+with statistical and randomized signatures that efficiently spot mutating
+spam content. User input is validated through reputation assignments based
+on consensus on report and revoke assertions which in turn is used for
+computing confidence values associated with individual signatures.
+
+Razor Agents are written in Perl and will work on most Unix operating
+systems and others OSes for which perl is available.
+
+Vipul's Razor v2 is almost a complete rewrite of Razor v1.