When the browser opens a secured connection, https can be seen in the URL instead of just http. To know if a website is secure or not, look for the locked yellow colored padlock symbol on the lower right corner of the browser window. Some web sites use a secure connection between the web site and your browser.
93%. the literacy rate of China is 82%. but it wasn't always this high! prior to 1999 only 20% of Chinese were literate!
Some of them may only have ever appeared a few times, so there is no need to be put off by this huge number. The number of characters in common use is much much smaller. According to research, if you are familiar with the 500 most common characters in Chinese then you can read 75% of modern Chinese. If you know 1000 characters, you can read 89%. 2000 characters gives you 97% coverage.