Avoid the session mechanism?

Found this article and need the experts to consult on the statement "avoid the session mechanism". Is this a true problem? And what should we do if we cannot have a dedicated server to ourselves? http://www.dwheeler.com/secure-programs/Secure-Programs-HOWTO/php.html Avoid the session mechanism. The ``session'' mechanism is handy for storing persistent data, but its current implementation has many problems. First, by default sessions store information in temporary files - so if you're on a multi-hosted system, you open yourself up to many attacks and revelations. Even those who aren't currently multi-hosted may find themselves multi-hosted later! You can "tie" this information into a database instead of the filesystem, but if others on a multi-hosted database can access that database with the same permissions, the problem is the same. There are also ambiguities if you're not careful (``is this the session value or an attacker's value''?) and this is another case where an attacker can force a file or key to reside on the server with content of their choosing - a dangerous situation - and the attacker can even control to some extent the name of the file or key where this data will be placed. _________________________________________________________ Do You Yahoo!? Get your free @yahoo.com address at http://mail.yahoo.com