The hottest gadgets at Mobile World Congress 2015

Security-conscious individuals should pay close attention to the new Blackphone 2 smartphone and the Blackphone+ tablet, which will be available later this year.

The company that makes these devices -- Silent Circle -- prides itself on going to great lengths to maintain user privacy, specifically establishing itself in Switzerland to take advantage of "the world's strictest privacy laws".

The new smartphone is larger than the original Blackphone, featuring a bigger screen, better processor and a sleek black shell.

Meanwhile, the Blackphone+ is the company's first tablet.

These devices run on PrivatOS, an Android-based operating system created by the company to ensure data doesn't get leaked.

"It puts privacy in the hands of the user, without any sacrifice to your productivity," the company said in a press release

The devices also come with a slew of special apps dedicated to keeping data secure, and offers a store where users can download additional apps that have been "vetted" by the Silent Circle team.