The information displayed has been prepared and certified by Verisign, a certifying organization that guarantees that information is authentic. You can make payments in total security and reveal the number and expiry date of your card in full confidence. The server checks whether your card is valid. If your transaction is accepted, the server makes the payment by debiting your account with the amount of the transaction. Electronic commerce in detail Electronic commerce puts a buyer and a trader in virtual contact so that transactions can be performed by electronic means.
Guaranteed security is essential to establish the climate of trust that has to prevail.
When your computer communicates with a server, you have to be sure you're talking to the right machine, and not to another server passing itself off as the server you want. Authentication is the service that reassures you that the entity you're communicating with is indeed what it claims to represent. 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.