Square reader | Square
In the convoluted mobile payments space, there's perhaps no other company with more momentum than Square. During its latest round of funding, the three-year-old company led by Twitter co-founder Jack Dorsey raised over $200 million and is now valued at $3.25 billion, according to AllThingsD.
Square has updated its credit card reading dongle to include hardware encryption circuitry. Previously, the dongle sent unencrypted credit card information to iOS or Android devices that could be read by other apps.