"The security of your information, transactions,
and money is the core of our business and our top priority at PayPal. PayPal
automatically encrypts your confidential information in transit from your
computer to ours using the Secure Sockets Layer protocol (SSL) with an encryption
key length of 128-bits (the highest level commercially available). Before
you even register or log in to our site, our server checks that you're using
an approved browser - one that uses SSL 3.0 or higher. Once your information
reaches us, it resides on a server that is heavily guarded both physically
and electronically. Our servers sit behind an electronic firewall and are
not directly connected to the Internet, so your private information is available
only to authorized computers. "