Survey: More than half of U.S. government employees unofficially work at home on nights or weekends, raising concerns about the security of the data theyre working on. Fifty-four percent of these unofficial teleworkers carry files home, according to the survey by the Telework Exchange. Less than half provided security training to employees after the VA breach, survey says. The survey has a margin of error of 6.1 percent, survey by group that advocates for more telecommuting opportunities.”]