Connecting Intranet to Internet

Hai all,

I want to do a project that Connecting Internet to Intranet with all security.Can any ideas please ? .

My project description:

We have some clients those are transcript our data through internet.Daily we provide some data to those clients those r working in home.Suppose we send 5 files means they transcribed those files and send to our database using my company database.
Now we want to send only one file at a time and after they transcribed and sent to our database we send another file manually.

So we want to stop sending files manually.For that i want to do one project when they transcribed and posting the file then only he /she get the anothe file.
so for this i want to connect Intranet to Internet.So how can i do this ? Using VPN or anything.So please give some ideas and some related sites for sample softwares or Information.

Please tell me How we connect Intranet to Internet with Security ?

Thanks in advance,
Nagesh.

re: Connecting Intranet to Internet

One of the fewer-read section of the Posting Guidelines covers our policy for not providing answers for homework.

So, with that in mind, what do you think would be a good way to approach this? Would a VPN cover the 'automated' section of your requirements? What else would that require?