IBM said the acquisition would strengthen its position in database security, but enterprises are shifting away from siloed security products in favour of an integrated approach that protects more than just databases, said Shlomo Kramer, chief executive at Imperva.
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"Security professionals need to understand how sensitive data is accessed by internal and external users through business applications to block malicious insiders and hackers," he said.
IBM plans to integrate Guardium's tools into its Information Management Software and its Business Analytics and Optimisation Consulting platform.
Kramer said the move could create a major integration headache if IBM is to be able to meet customer demands.