The Target security breach that may have affected as many as 110 million customers — with their names, mailing addresses, phone numbers and credit card information possibly swiped — ranks as the most extensive corporate data hack ever, experts said on Friday.
"This is the worst breach in history," Ken Stasiak, CEO of SecureState, told NBC News. "It's 2014. We expect retailers of this magnitude to have better security, weigh their risks and spend the resources necessary to secure their data."
Yet without a massive shift towards a credit card technology called EMV that stores data on a chip instead of a magnetic strip, it's likely that data breaches of this size and scale will continue to plague the retail industry, Chester Wisniewski, senior security adviser at Sophos, told NBC News.
Some holiday shoppers had earlier cut up their cards after Target announced on Dec. 19 that some 40 million accounts had been put at risk by a hack that stretched from before Black Friday through mid-December. When the company announced on Friday that 70 million or more people may have been affected, however, the breach soared past prior incidents like the 2007 theft of 45 million credit card numbers from the parent company of TJMaxx and Marshall's.
(Read more: How debit, credit card users can protect their info)