Do you know who is accessing your Google Account?
Well, I did not know till yesterday. However, when I learn what apps are accessing my Google Accounts and particularly Gmail, I was really really scared. I receive lots of emails and just like all of us, some are private and some contains essential information about server setups. I have been using Google for many years and I have used their authentication at quite a many places. When I login to any site with the help of Google Account, I really do not see what is written there as in most cases I just trust the sites. This is indeed not good as there are some sites which can pretty much access all of your data from your google account and we are not even aware of the same.
When I logged in, I found that over 200 different applications have access to my various google services. Some are very much valid but some services should have been very well protected. For example Flipboard application accessing my YouTube account is valid and I have personally approved it but there were some services reading my emails where I am no more using those services was not a good idea. I spend over 6 hours to clean my various access to my Google Accounts and now I am feeling pretty safe.
Here is what I have done.
Sign in on the Google Accounts homepage. Now click Security on the left-hand side of the page.
Scroll down to the Connected applications and sites section and click the Manage access button.
Click Revoke Access next to the service you want to disconnect from your account.
I strongly suggest that you review all the permissions and make sure there is no unauthorized access to your account.
Well – that is Reference: Pinal Dave (https://blog.sqlauthority.com)