What is SiteSig (c)?
SiteSig (c) is an experimental "reverse search engine".
What is a Reverse Search Engine?
A search engine maps search queries to web pages. A reverse search engine maps web pages to search queries. More specifically, it generates search queries that allow users to find particular pages in the future, even if the pages move.
Generated search queries can be resilient bookmarks for pages at a temporary or multiple locations. The search is not locked to a particular copy of the page and can handle some amount of content change.