It was reported last week that London’s Oyster Card was hacked, with details to be published in October. Since then, the system has crashed, again, creating speculation that the hack is already out in the wild and being used.

“There is currently a technical problem with Oyster readers at London Underground stations which is affecting Oyster pay as you go cards only,” explains the TfL website. To minimise confusion, gates at all underground stations have been opened.

“We believe that this problem, like the recent issue, resulted from incorrect data tables being sent out by our contractor, Transys,” claims Maskell.

While the court case had been ongoing, the details of the hack had been released online at Wikileaks. If one had been quick enough, they could have saved the details and worked out further flaws in the Oyster Card.

Apparently, Wikileaks posted the wrong paper. The paper that had been released was an older document, however you can read a discussion about it on their site. arXiv.org has the details on the Mifare attack.