[header] How to use a credit card to order online [title] Connect to a secure, encrypted network. [substeps] Some browsers use the symbol of a closed padlock to denote a secure network connection. You can also look for " [https " https "] in front of the internet address, instead of the normal " [http, " http, "] to indicate a secure network. 
Avoid sending credit card information by e-mail over an unsecured network. Although e-mail might seem private, it's all too easy for another user on the same network to monitor your transmission.