Why does the website need HTTPS?

Everyone knows an online popular quote and a famous comic book "online, no one knows you are a dog":

< p>

This is dangerous for online shopping and e-commerce, because you can not and should not believe that the site of the alleged company (a certain brand) is your idea of the real world of a certain company (a brand); At the same time, the IP technology used by the Internet is to transmit all the information in plaintext, so that All the confidential information you submit on the site is likely to be visible to anyone else, because there are many routes from your computer to the Web server, and many people have access to transmission routes, and it is possible to illegally intercept or even tamper with your confidential transaction information (especially card information). ) 。

And HTTPS is a secure HTTP connection, S is secure, that is, if you are browsing the page of the browser address bar in front of the URL is https://(the general site is http://), it indicates that any information you enter on this site is encrypted from your computer Transferred to the Web server. Only in this way can we guarantee that the confidential information you submit on the website is automatically encrypted and transmitted to the website server, and will not be illegally intercepted or tampered with.

In order to let the user have a eye-catching awareness (users often do not pay attention to is HTTP//or https://), so the browser made a clear security lock flag, ie browser as an example, as shown in 1 for the IE 10 version of the browser's security lock logo, is displayed in the status bar in the lower right corner, the mouse on the security lock The current encryption strength (128-bit) is shown above:

650) this.width=650; "Src=" http://img.blog.csdn.net/20140904101946927?watermark/2/text/ ahr0cdovl2jsb2cuy3nkbi5uzxqvumv6yxjr/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70/gravity/ Southeast "Style=" Border-top-style:none;border-right-style:none;border-bottom-style:none;border-left-style:none ; "/>

Why does the website need HTTPS?