US Patent 8442994 Custom search index data security

A system includes a server to store content and a content searching system. The content search system includes an application programming interface to receive user-selected metadata uploaded from a first user, where the metadata includes data that describes content stored at a server. The content searching system further includes an indexer to index the metadata to produce a metadata search index, a search engine to search the metadata search index based on a search query received from a user to produce metadata search results, and a delivery engine to send the metadata search results, and a link to the remote server, to the user to permit the user to access the content stored at the remote server.