(Telecompaper) Silent Circle, a developer of mobile encryption and security software, announced it has raised USD 30 million in a round of funding led by investors including Ross Perot Jr and private investment fund Cain Capital. Silent Circle will use the cash to accelerate its growth and further develop the Blackphone, its secure smartphone. The company also announced that it has added Perot and Peter Bonfield, the former CEO and chairman of BT, to its advisory board and appointed Anurag Jain, formerly a senior Dell executive, as vice chairman. Silent Circle also announced that it is relocating its global headquarters from the Caribbean island of Nevis to Switzerland. The company also has offices outside Washington, DC and in London and data centres in Canada and Switzerland. The company said Switzerland's "strong privacy laws, legendary neutrality and economic business advantages" support its efforts to offer secure, private communications. Silent Circle confirmed the Blackphone, developed with Spain's Geeksphone and first unveiled in January, will start shipping in June.