How secure is the Capital One online account service?
When you connect to the Capital One Online account service, your session is encrypted. Any data or messages that you send are encoded by your browser using a unique secret key (a session key) agreed with our secure server at the beginning of your session. When your encrypted data is sent over the internet only the Capital One secure server will be able to decrypt and understand it. The same encryption also occurs when Capital One displays screens back to you. Capital One uses Secure Sockets Layer (SSL) protocol for managing your encrypted session and 128 bit encryption which is why the latest versions of Web browsers are needed to register and use this service. For more information on SSL and encryption, many resources are available on the Internet, or via your internet browsers’ help section.