Website and APP we used now are mostly web2.0 applications. 

While people practise in use, they can not make sure the data is accurate and safe. 

Why we say that ? 

Main reason is, there website and APP are developed by organization or person, data was stored on there servers.

So there are risks in data tamper and disclosure. 

It lets all application lack a kind of most really charm – Decentralization. 

Lets imagine, A game had existed you ever played in upon a time, where are they?

 

Link：https://www.cnblogs.com/farwish/p/12319234.html

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