| # <@LICENSE> |
| # Licensed to the Apache Software Foundation (ASF) under one or more |
| # contributor license agreements. See the NOTICE file distributed with |
| # this work for additional information regarding copyright ownership. |
| # The ASF licenses this file to you under the Apache License, Version 2.0 |
| # (the "License"); you may not use this file except in compliance with |
| # the License. You may obtain a copy of the License at: |
| # |
| # http://www.apache.org/licenses/LICENSE-2.0 |
| # |
| # Unless required by applicable law or agreed to in writing, software |
| # distributed under the License is distributed on an "AS IS" BASIS, |
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| # See the License for the specific language governing permissions and |
| # limitations under the License. |
| # </@LICENSE> |
| |
| package Mail::SpamAssassin::FuzzyHash; |
| |
| use strict; |
| use warnings; |
| |
| our $VERSION = '1.0'; |
| |
| =head1 NAME |
| |
| Mail::SpamAssassin::FuzzyHash - Fuzzy-hash similarity detection for SpamAssassin |
| |
| =head1 DESCRIPTION |
| |
| This is the root namespace for fuzzy-hash algorithms used by SpamAssassin |
| to detect near-duplicate spam messages. |
| |
| =head1 AVAILABLE MODULES |
| |
| =over 4 |
| |
| =item L<Mail::SpamAssassin::FuzzyHash::ZOrder> |
| |
| MinHash-based fuzzy similarity using exactly 4 DNS TXT lookups. |
| Detects texts with approximately 90% token overlap efficiently. |
| |
| =item L<Mail::SpamAssassin::FuzzyHash::Util> |
| |
| Shared utility functions used by fuzzy-hash implementations: |
| C<normalize_tokens()> and C<hamming_distance()>. |
| |
| =back |
| |
| =cut |
| |
| 1; |