Tabulating the number of records exposed is difficult because in 56% of the 2007 breaches reported, there was no accurate count of the number of records exposed.
The year 2007 may or may not have been a record-setting year in terms of data breaches. Whether it was or wasn't depends on how one counts.
The Identity Theft Resource Center put the number of publicly reported data breaches in the United States at 446 for the year. It identified 312 data breaches in 2006 and 158 in 2005.
That appears to show an upward trend, if such a thing can hinge on a mere three data points, and that more data breaches occurred in 2007 than at any time since 2003, when data breach reporting laws like California's SB 1386 took effect.
Based on his or her analysis of data breach statistics compiled by three sources -- Attrition.org, Privacy Rights Clearinghouse, and the Identity Theft Resource Center -- Dissent points out inconsistencies in counting methodologies and argues that without the TJX breach (parent company to T.J. Maxx and others), which skews the statistics by virtue of its extreme size, two of the three sources show a decrease in data breach incidents and in records exposed.
Rex Davis, director of operations for the Identity Theft Resource Center, concedes Dissent makes some valid points, like the fact that the organization began counting paper-based data breaches in 2007.
But Davis also points out that tabulating the number of records exposed is difficult because in 56% of the 2007 breaches reported, there was no accurate count of the number of records exposed. "How can you say the number of records is going up or down when it's not reported?" he said.
Reasonable people can also disagree about the year in which data breaches should be counted. Davis said his organization prefers to go by the date of publication. "We chose the publication date for 2007 rather than the incident date," he said. "A lot of times we can't even get an incident data. TJX is great example."
But as Dissent points out, if TJX were counted in the year 2006 or 2005, 2007 would look at lot better.
While Dissent's assessment of data from Attrition.org and Privacy Rights Clearinghouse suggests a decline in the number of data breach incidents, the ITRC is sticking with its incident figures. "If you're talking about the number of events, it's the worst year we've been able to record, even if you add the 80 we left out in 2006," said Davis.
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