Many companies haven't updated their data breach plans since developing them, report a lack of adequate employee training on data protection, and still haven't figured out how to guard cloud services and mobile devices, according to a new study.

The "Seventh Annual Study: Is Your Company Ready for a Big Data Breach?" was sponsored by Experian Data Breach Resolution and conducted by Ponemon Institute.

"I was surprised that two out of three respondents said they haven't reviewed or updated their data breach preparedness plans," said Michael Bruemmer, vice president of data breach resolution and consumer protection at Experian. "Preparedness plans can't be a binder on a shelf that are not active and fluid plans. They should be reviewed and updated at least on a yearly basis."