The Atlanta, Georgia-based company is best known for its IronMail gateway appliances for the corporate environment, but as the take-up of mobile email by enterprise users continues apace, it has felt the need to expand into that area too, with RIM’s service clearly being the highest priority, given the BlackBerry’s success in the business world.

While the over-the-air part of a transmission, between the BlackBerry Enterprise Server and the end device, is AES-encrypted, it goes as clear text over the internet from the BES to another BES or email server, and that’s the part we’re seeking to secure, said a spokesperson for the company.

The spokesperson added that the capability being developed would not be BlackBerry-specific, enabling CipherTrust to address the growing number of other push email services being offered by mobile operators such as Vodafone, T-Mobile and others, who are white-labeling software packages from the likes of Visto and Seven. The CipherTrust source said it hopes to be able to publish the results of the trial by the end of November.