✔ 最佳答案
What is SSL?
Since its introduction in 1994, SSL has been the de facto standard for e-commerce transaction security, and it's likely to remain so well into the future.
SSL is all about encryption. SSL encrypts data, like credit cards numbers (as well other personally identifiable information), which prevents the "bad guys" from stealing your information for malicious intent. You know that you're on an SSL protected page when the address begins with "https" and there is a padlock icon at the bottom of the page (and in the case of Mozilla Firefox in the address bar as well).
Your browser encrypts the data and sends to the receiving Web site using either 40-bit or 128-bit encryption. Your browser alone cannot secure the whole transaction and that's why it's incumbent upon e-commerce site builders to do their part.
128b=128bit SSL Encryption
2006-11-08 02:11:14 補充:
full version :
http://www.webopedia.com/DidYouKnow/Internet/2005/ssl.asp