I am looking for a software that when a user goes to my site they log in with a unique user name and password. Each user would then have specific access levels to files and folders and they can not see links to anything they do not have access to. I need it to have user access levels down to each specific user not a generalized group.
For example, Bill has access to (folder A, sub-folder A, and B) and (folder B, sub-folder A, and B). Ted has access to (folder A, and sub-folder B) and (folder B, sub-folder A, B, and C). Both Bill and Ted can not see links to folders or files that they do not have access to.
Is there any available software that is specifically made to do this.