  In this paper we introduce a new way to deal with Grid portals referring to
our implementation. L-GRID is a light portal to access the EGEE/EGI Grid
infrastructure via Web, allowing users to submit their jobs from a common Web
browser in a few minutes, without any knowledge about the Grid infrastructure.
It provides the control over the complete lifecycle of a Grid Job, from its
submission and status monitoring, to the output retrieval. The system,
implemented as client-server architecture, is based on the Globus Grid
middleware. The client side application is based on a java applet; the server
relies on a Globus User Interface. There is no need of user registration on the
server side, and the user needs only his own X.509 personal certificate. The
system is user-friendly, secure (it uses SSL protocol, mechanism for dynamic
delegation and identity creation in public key infrastructures), highly
customizable, open source, and easy to install. The X.509 personal certificate
does not get out from the local machine. It allows to reduce the time spent for
the job submission, granting at the same time a higher efficiency and a better
security level in proxy delegation and management.
