Nippon Telegraph and Telephone Corp. is buying Solutionary, a security services provider, for an undisclosed amount.

Omaha, Neb.-based Solutionary provides security services and security consulting for traditional and virtual information technology infrastructures.

Nippon Telegraph, headquartered in Tokyo, is an information technology and telecommunications company that provides cloud services, including security services.

Solutionary was recapitalized by private equity firm Clearlake Capital Partners in November 2011.  The Santa Monica, Calif.-based firm purchased a unit of Agilysys Inc. (Nasdaq: AGYS). It also announced it would take online retailer Bluefly Inc. private in May.