AT&T adds to its acquisition lineup with a security startup

AT&T (NYSE:T) is making yet another acquisition, but this time it's about security instead of premium channels or ads.The telecom and media giant said Tuesday it plans to acquire AlienVault, a Silicon Valley company with more than $100 million in funding. Terms of the deal were not disclosed in a press release announcing the agreement.AlienVault specializes in security products that can help small- and medium-sized businesses. AT&T said it can benefit from both the technology and talent