The purchases of Trusteer and Silver Tail remove two of the more prominent web-fraud detection vendors from the market, Litan said.
Remaining independent security companies include NuData Security Ltd. of Vancouver, British Columbia, and Israeli firm Versafe Ltd., which is backed by the private equity arm of Susquehanna International Group. IBM and Trusteer expect to close the deal in the third quarter.
Earlier this year, in June, IBM bought SoftLayer Technologies Inc., a Texas-based cloud infrastructure provider majority-owned by private equity firm GI Partners, for $2 billion. A month later, it acquired closely held Israeli cloud computing technology company CSL International for undisclosed terms.
IBM also acquired Cleveland-based UrbanCode Inc. and the software portfolio of Star Analytics Inc. earlier this year.-- Written by Chris Nolter in New York