After Heartland Payment Systems Inc. announced a massive data breach in January, its chief executive officer, Robert O. Carr, issued a call to action, suggesting that payments players implement end-to-end encryption and share breach forensics among themselves.

Some dismissed the notion as a public relations ploy to distract from Heartland's culpability in the case, but Carr made good on his word this month by creating a group to help processors collaborate on fighting fraud.

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