I have recently installed Tweetdeck, because my previous client stopped working.
In my custom client, and in the third party client I have used previously I had to setup authorize the application in my Twitter account and the use generated PIN to validate the client origin.
Now I have noticed that in Tweetdeck, I was only asked for my username and password for my account.
How can I verify that the executable is actually official from Twitter? And how can Tweetdeck access my Twitter account without my permission?