  Nowadays, storage systems are increasingly subject to attacks. So the
security system is quickly becoming mendatory feature of the data storage
systems. For the security purpose we are always dependent on the cryptography
techniques. These techniques take the performance costs for the complete
system. So we have proposed the Java File Security System(JFSS). It is based on
the on-demand computing system concept, because of the performance issues. It
is a greate comback for the system performance. The concept is used because, we
are not always in need the secure the files, but the selected one only. In this
paper, we have designed a file security system on Windows XP. When we use the
operating system, we have to secure some important data. The date is always
stored in the files, so we secure the important files well. To check the
proposed functionality, we experiment the above said system on the Windows
operating system. With these experiments, we have found that the proposed
system is working properly, according to the needs of the users.
