A Web server that utilizes security protocols like SSL to encrypt and decrypt data, messages, and online payment gateways to accept credit cards, to protect them against fraud, false identification, or third party tampering. Purchasing from a secure Web server ensures that a user’s credit card information or personal information can be encrypted with a secret code that is difficult to break. Popular security protocols include SSL, SHTTP, SSH2, SFTP, PCT, and IPSec.