Internet Services Provider EarthLink is acquiring Aluria Software, a privately held firm focused on security applications.

Terms of the deal were not disclosed. EarthLink (Nasdaq: ELNK) said Aluria would be part of a new division at the ISP.

Aluria has developed anti-spyware tools such as Spyware Eliminator, which has 20 million users, and Paladin, an anti-spyware product developed for businesses and corporations. It also offers other security and system optimization tools.