But Schumer said that if the data were hacked it could compromise personal information on shoppers' phones.

WSJ: Schumer: Don't track shoppers without consent

Dynamic elements to transactions will make account data hard to steal or compromise, thus making merchant systems safer and more secure.

FORBES: EMV Chip Technology, Secure Electronic Payments

Sharing data with Google is a compromise necessary to monetize the site, he adds, arguing that Google has a spotless record for keeping search information private.

FORBES: Ask.com's Search Policy Splits Privacy Groups