A survey conducted by the Ponemon Institute on behalf of Symantec found that of 1,000 employees who had changed jobs in the past year, 59% said they took corporate data when leaving.
Of those who stole data, 67% said they used it at their new job.
The Ponemon study found that 24% of respondents were able to access corporate systems after they left.
Of those, 15% reported that they accessed the system a week later and 20% said they accessed it more than a week later.
A recent survey of 235 business managers from large enterprises conducted by the firm Courion found that 53% of IT managers are mostly unaware of employee access rights to systems.
Approximately 30% of organizations interviewed by Courion still manually provision their user accounts.
HR and other business leaders at 48% of surveyed organizations take more than one day to alert IT departments about employee terminations.
23% of IT organizations take an additional day or longer to turn off employee access to systems.
Approximately 34% of respondents said that it can take up to a week or longer to ensure that terminated employees are completely shut off from IT systems.
Nearly one in 10 organizations reported that they could never be completely sure that terminated employees no longer have access to all IT systems.
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