Trend Micro has acquired Identum, an email encryption software vendor based in Bristol, in a move to strengthen its software-as-a-service product portfolio.

Identum's Private Post desktop and gateway server products will be integrated into Trend's existing line of products and rebranded "Identum as Trend Micro."

The Identum server software, which will automatically encrypt messages depending on the user's corporate security policy, can be used alongside existing email and compliance products. It gives Trend a way to add email encryption to its InterScan Messaging Hosted Security product line.

Like other security vendors, Trend has been trying to beef up its software-as-a-service lineup in recent months, offering customers a simpler way to keep on top of the latest threats than traditional security products do.

The acquisition will "ensure an even safer, more secure Internet experience for the company's global customers," Trend said.