>>>>> "Kaushik" == SEN <SEN> writes: Kaushik> PGP and GPG are used for data encryption, not network Kaushik> security. They use the same underlying algorithms as SSH Kaushik> and SSL. Some. For instance, GPG supports Elgamal which SSL doesn't to the best of my knowledge. >> > Netscape already has it built in. The mail server that you >> use needs > to be capable of speaking SSL. I don't know of any >> that run on Linux. Run sendmail through ssltunnel. Kaushik> Hi Arun, There is an increasing need to develop Kaushik> applications for implementing VPN in enterprises As Kaushik> you've said Linux has'nt a mail server that supports SSL, Kaushik> so a problem of secure communication arises between Win Kaushik> and lets put it as Non-Win machines. As of now there are Kaushik> no agreed upon protocols,therefore it is up to the Kaushik> software developer to use his ingenuity and come up with Kaushik> a solution. The solution being use of some encryption Kaushik> techniques on the data and sending it over by some Kaushik> established means i.e ftp,http etc.. and decoding at the Kaushik> recieving end. The same is applicable to files or mail. Use GPG (or PGP) for standard files. For E-mail, I'm still looking for a PGP/GPG plug-in for Netscape Messenger or Outlook Express which will allow me to exchange PGP/GPG messages with winduhs weenies^H^H^H^H^H^H^H users. Kaushik> Therefore we're looking at something that's definately Kaushik> like PGP for secure communications. It's not Network Kaushik> Security ,in the sense of restricting access ,but Kaushik> security from unauthorized access in the Network. bye, Kaushik> Kaushik Sen <[EMAIL PROTECTED]> Kaushik> <[EMAIL PROTECTED]> Regards, -- Raju ----------------------------------------------------------------------- For information on this and other Linux India mailing lists check out http://lists.linux-india.org/