In another spot consolidation among security firms, Liquid Machines has acquired Omniva.

Both companies sell software used to manage digital rights in the enterprise. Liquid Machines for documents, Omniva for e-mail. By merging the products, Liquid Machines plans to offer a complete rights management offering, CEO Michael Ruffolo said.

Liquid Machines' product includes a client and a server component and allows a company to set rights for documents created within the company. These rights can include the ability to print, cut and paste, change and save a document. Omniva Policy Manager allows users to set similar rights for e-mail messages.

Liquid Machines will rename Omniva's product Liquid Machines E-mail Control. Its own product will be called Liquid Machines Document Control. The renaming will occur in November, when Liquid Machines plans to release version 3.0, Ruffolo said. A combined product is planned for the second half of 2005, he said.

Both Liquid Machines and Omniva are venture-backed companies. Omniva employs about 20 people, approximately half of those will join Liquid Machines, Ruffolo said. The combined company will employ between 35 and 40 people, he said. Financial details were not disclosed.

The deal is the latest in a spate of takeovers and mergers in the security space. Last Thursday, Symantec said it had agreed to buy security consultants @stake and later this week TruSecure is expected to announce that it will merge with professional services and certificate-management company Betrusted.