Before logging in to a web site using an account and password, ensure that the site is secure. Different Web browsers show this in different ways. For example, in Microsoft Internet Explorer you can check that ‘https://’ is displayed at the start of the web address. If your Web browser displays a padlock, this indicates a secure connection and that the issued digital certificate from the site is valid.
Similar to PINs, don’t record or store your card’s CVV. CVV numbers are used for online purchases and are printed on the back of Credit Cards. The only record should be the CVV printed on your card.
Some other tips to consider: