Recently my debit card information went to another hand, and he/she started to u

Question

Recently my debit card information went to another hand, and he/she started to using it until my bank reports that there is an overdraft. I use Ubuntu 14.04 machine.

I am sure I am not a victim of phishing, or email-scam. But I sometime use debit card for online purchases.

Moreover, after going through my account history, I have noticed that these unauthorized transactions occurred just a couple of days after a taxi ride, where I had to pay with my debit card.

And during the same time I just started to explore the Tor network.

I do not have any firewall.

what could be the reason? Any idea?

Explanation / Answer

You describe three possible attack vectors in your post:

Of the three, I'd rank having it stolen from your computer as the least likely. There's very little Linux malware, and most of it is focused around taking over computers and using them as servers/botnet nodes, rather than the typical Windows malware that tries to steal financial or account information.

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