A few weeks ago some of the authors from here place there a puzzle. It brought me a lot of funny, so I decide to make my own one. Can you guess the right password from this?

Write your solution as a comment, the first right answer will be rewarded by 100 per-cent tip to the author's article. Try to solve and enjoy it!
QW
Update 23rd of June: No one knows? So, there is a solution. The first image is a logo of Ethereum, its abbreviation is ETH. The second image is the classical mailbox of Royal mail where are hidden letters between the crown and the words "ROYAL mail". The letters are E and R. The third image is a navy signal flag means letter E. And the last image is a part of the periodic table where the aluminium is highlighted, its abbreviation is Al. The letters together make a word ETHEREAL.
Now solution is known, the game is over.