At a poker tournament in Barcelona last September, Jens Kyllönen, a professional player, said that his room at Hotel Arts was broken into and malware was installed on his computer to transmit anything he saw on his screen as he played. Despite video camera systems and electronic key card entry logs, no one was caught. Although he said he discovered the malware in time, he says he is much more careful now about where he stores his belongings and secures his computer. Hotel Arts declined to comment, saying it was a private event. His case is just one in what has become a technological cat-and-mouse game between hotels and criminals.

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