As in IE, you can clear the current history file and set the number of days you want the browser to save your history. You can also delete the entries that appear under the pull-down address bar where you enter URLs. Most of the security settings can be found in the Security Info dialog box. Click on Navigator to view settings for the browser, especially how it handles encrypted data. Watch traffic like a hawk.
Issue licenses to buy.
If you're conducting e-commerce on your Web site, secure your transactions with digital certificates. Web content off-line. Set up a staging area internally where relatively important data is held and reviewed before being posted to your Web site. Make this area password-protected and enforce the password component. Protect your database.