The Information Technology Association of America has absorbed the Cyber Security Industry Alliance, a lobby that has been pressuring lawmakers to pass federal data security and breach notification measures.

Symantec announced this week plans to buy AppStream, provider of on-demand application delivery.

Hitachi has acquired M-Tech Systems, Inc. as part of a strategy to broaden its overall security portfolio.

Microsoft has shored up its enterprise security portfolio -- and gained a toehold in the government marketplace -- with the acquisition of Komoku, a government-funded startup with products that snoop out rootkits.

In an attempt to boost its online privacy stance, Microsoft has announced that it has acquired the U-Prove identity management technology from Credentica.

A dismal earnings forecast this week from intrusion prevention maker Sourcefire underscores some of the challenges facing public IT security companies, a pair of analysts said Friday.

ChoicePoint, whose watershed breach prompted a burst of state disclosure laws, has been acquired by LexisNexis information service parent, Reed Elsevier, for $4.1 billion, the two companies announced Thursday.

U.K.-based encryption and key management provider nCipher announced today it acquired most of the intellectual property and assets of NeoScale Systems, an appliance-based enterprise storage security firm that recently ceased operations.

IBM has announced it is acquiring Arsenal Digital Solutions, a provider of managed data-protection and storage management services.

Anti-virus vendor Grisoft announced today that it has acquired web-browsing security provider Exploit Prevention Labs.