1. An accessing method comprising: attempting access of a first networked entity having a first preselected security level by a search engine having a second preselected security level; allowing access of the first networked entity by the search engine upon the second security level being equal to or higher than the first security level; attempting access of the search engine by a user having a third preselected security level; and allowing access of the search engine by the user upon the third security level being equal to or higher than the second security level.