Square says the new portable card reader is ‘one of the thinnest and lightest’ POS devices on the market. ...

Square’s hugely practical card reader can be used on its own or to supplement your static business by allowing the processing of mobile card or contactless payments on the go. Why you can trust ...

As helpful as a Square Reader may be for purchases at trendy stores, you'll want to watch out -- in the right circumstances, they can also be used to steal your credit card info. Security ...

In a highly unusual move, electronic payment vendor VeriFone Wednesday said it found a “gaping” security hole in a free plug-in mobile credit card reader from Square, a startup launched by ...

Square and PayPal are disrupting ... Vendors can take card payments through the Chase mobile app or QuickAccept’s contactless card reader, and the service will offer same-day deposits without ...

And it also announced something that got far less attention: Square will be releasing a new card reader (the thing you plug into your phone) this summer, and it will use encryption at the read head.

Mobile payments startup Square now offers its credit card reader for iOS and Android devices at many Walgreens, FedEx Office, and Staples stores across the U.S., the company announced today.