Hi Guys, sorry for being not too active on the forum.
And thanks for letting me know that people are taking Assassin's artworks and claim them as their own. We can't prevent art thieves on internet, and I totally don't see why they are stealing art, instead of spending this time in front of the computer or drawing table to practice their art skills.
Gaming studios know where those concept arts are coming from, and if they get caught during interviews, they will be black listed in the industry, I can't see how this can help their career.
I believe that we are on this forum because we love art, so let's all enjoy it, and respect other people's hard works.