Abstract: The present invention authenticates a user using identifiers and authentication information provided and displayed by the mobile terminal and the service server to and on the user terminal, in conjunction with each other. Accordingly, unless an external intruder collects information necessary for authentication from the mobile terminal, the service server, and the user terminal in the same time span, the external intruder cannot perform authentication in place of a user. The present invention can be used to process authentication in portal sites, websites of financial institutions such as banks, personal blogs, homepages, and a variety of other websites using the Internet.

Abstract: A system for managing content display information by the disclosed present invention includes an interface module, a web-content search module, and a content display information tracking module. The interface module receives input information from a user, and the input information includes website information, content information and search parameter information which are tracking targets. The interface module transmits the user the tracking results of the content depending on the input information. The web-content search module searches content on a website based on the input information inputted from the interface module. The content display information tracking module tracks the display information on a screen that displays the results from the web content search module, wherein the display information includes: a page that displays content, and display priorities on a displayed page.