Yet 1 more thing to be aware and careful of:
Quote:
Researchers attending the Black Hat security conference on Thursday demonstrated two ways in which Square ? a mobile gadget that enables Android, iPhone, iPad and iPod touch users to accept credit card payments ? can be hacked to accept stolen credit card data, with very little technical hardware required and ?no technical skills at all.?
Adam Laurie and Zac Franken, directors of Aperture Labs, discovered that due to a lack of encryption in the current Square app and free dongle for swiping cards, the mobile payment system can be used to steal credit card information, without even having the physical credit card.
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Source:
http://mashable.com/2011/08/05/square-security/
Here's the key problem: "without even having the physical credit card"