What is Oauth Authentication. Is it safe..?

Now a days Internet is very comman in our day to day life . We even cannot think our life a second without Internet. Our life is surrounded by many websites and mobile applications . Some time you guys have seen some websites in which you have to login but you don't have account on that particular website so either you have to create that account by clicking Register or Signup button which takes longer process as after clicking you have to enter many details like your Name, Email, Mobile no. etc. and after that sometimes the sites will give you the verification code or link to click on it to verify.
             But its a long process you must have also seen an option of Login with Facebook or Google or with you Twitter account this , other way of logging into the websites with actually registering it is know as OAUTH AUTHENTICATION.

 Is OAUTH AUTHENTICATION safe..?

Now the question arises is it safe to Login with other account like Google or Facebook this might be possible that, the particular site for that you want access might steal you data from Facebook and Gmail account. 

              But here you are wrong.

These sites i.e Google and Facebook do not provides the details to that particular site like this .
As after clicking on Login with Facebook or Login with Google a page  is opened in your browser in with you have to login to your account if you are not logged it . And after that the site Facebook or Google tell you that the particular site for that you are going to logging in will take this much Information like Your Name , Email , or your Location etc.. if you agree with it then click ALLOW ACCESS if not then click deny.
               Now after that the particular site for which you are going to logging in will send an access code to Google and Facebook asking permission for details and showing access code as a proof as , that particular site is genuine.
             And after getting the access code Google or Facebook shares information with that particular site.
       So its safe to your OAUTH Authentication methods.
 
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