Digital identity is that a concept that prevails in the domains of cyberspace, and is defined as a set of data that uniquely describes a person or a thing (sometimes referred to as subject or entity) and contains information about the subject's relationships to other entities.
One only she / he knows (ie key), and the other is public (public key). The metaphor of a digital ID certificate. Likes Facebook or Twitter, they are all need use password and also need digital ID certificate. Used digital identity can be able to prevent others to use your identity to commit crimes. It is more safety.I don't used facebook or twitter. because of in China, the government control the internet. so we can't login the Facebook or twitter, but i used the Weibo. it is kind of the Facebook. most of Chinese people use the Weibo. I can find some information in Weibo. likes some stars information or learn some make up skills in Weibo and so on.
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