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Tom Kellermann, chief cybersecurity officer at the security firm Trend Micro, says businesses have to understand that bypassing banks' procedures for wire-transfer confirmation is exposing them to fraud. "Internal procedures should change to ensure that all requests for the transfer of funds be verified," Kellermann says.

Consumers can now expect the same level of security and privacy in the digital realm as they do in the physical.

Anyone whose name and contact information appears in the 9.7GB stolen names contact information will likely be susceptible to opening emails purportedly from Ashley Madison, divorce lawyers and private investigators, says Tom Kellerman, chief cybersecurity officer for Trend Micro.

Unfortunately, the extortion attempts like the one against Mac are likely to increase in number, sophistication and targeting, says Tom Kellerman, chief cybersecurity officer at Trend Micro.

It's called "sextortion." Criminals contact users involved in illicit online activity and try to get money in exchange for their victim's silence. It's popular in South Korea,according to a report from security firm Trend Micro, where scammers try to initiate online relationships and then blackmail those who take the bait.