安全套接字层 (SSL)：
安全套接层 (SSL) 是用于在 Internet 服务器和浏览器之间建立关联加密链接的常规安全技术。此链接确保在线服务器和浏览器之间传递的每个知识都保持个人和完整。
SSL 是关联交易标准，被众多网站采用，以保护其与客户的在线交易。 SSL 允许可靠地传输社会安全号码、万事达卡号码或登录凭据等咨询信息。
安全电子交易 (SET)：
安全电子交易 (SET) 可以是一种确保网络上经济交易安全的系统。万事达、维萨、微软、网景等公司一开始就绝对支持它。使用 SET，用户将获得副学士学位电子证书(数字证书)，并在确保隐私和隐私的方式下，在客户、商家和购买者银行之间使用数字证书和数字签名的组合进行交易和验证保密。
SET 使用 Netscape 的安全套接字层 (SSL)、Microsoft 的安全交易技术 (STT) 和 Terisa System 的安全机器可读文本传输协议 (S-HTTP)。 SET 使用公钥基础设施 (PKI) 的某些方面，但并非所有方面。
| secure socket layer | Secure electronic transaction |
|---|---|
| SSL is basically an encryption mechanism for order taking, queries and other applications and available on customer’s browser. It does not protect against all security hazards and is natural simple and widely used. SSL is a protocol for general purpose secure message exchange. SSL protocol may use a certificate, but the payment gateway is not available . so, the merchant need to receive both the ordering information and credit card information because the capturing process should be generated by merchant. SSl protocol has been the industry standard for securing internet communication. SSL protocol was developed by Netscape for securing online transaction. |
SET is a very comprehensive protocol.It provides Privacy, integrate and authenticity.It is not used frequently due to its complexity and the need for a special card reader by the user. it may be abandons if it is not simplified. SET is tailored to the credit card payment to the merchant. SET protocols hides the customer’s credit card information from merchant and also hides the order information to banks to protect privacy called dual signature. SET protocol is a complex and more secure protocol. SET protocol was jointly developed by MasterCard and visa with the goal of securing web browsers for bank card transaction. |