No wireless LAN access point or complicated ID or password entry is required, and once pictures have been downloaded to the smartphone, it is simple to upload them to social networking sites.

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Without digital ID, we are stuck with the greatest friction point in Web commerce: that redundant typing in of passwords and filling out of home address fields for the umpteenth time.

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Dorner's ID and some of his personal belongings were found Thursday at the San Ysidro Point of Entry at the U.S.-Mexico border, according to the affidavit.

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"He came to this first point of access to the compound ... where you have to have your ID checked, you have to go through security, " Nuland said.

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