Data integrity You have to be able to send and receive information to and from the server. Data integrity is the service that reassures you that the information exchanged has not been tampered with. You also need to be sure that nobody can record your communications and afterwards use the information for their own purposes. Flow integrity is the service that reassures you that a message exchange is unique. It must not be possible to capture information input to or output from your computer, particularly sensitive data such as a bank card number.
Confidentiality is the service that protects data from being revealed to unauthorized third parties.
1 - You connect to the Internet. CyberCash is an American company that is a partner of the ATOS group, which provides a system of securing payments by virtue of encryption tools used between the purchaser, the trader and the payment server. You can make secure payments by charge card or credit card, and can also pay small amounts using an electronic purse. This protocol is now recognized by most. All information on SSL is available from Netscape Communication.