Koolspan

KoolSpan, Inc. provides simple secure connectivity solutions that seamlessly unite mission-critical network devices. KoolSpan TrustCall provides robust, cross-platform, end-to-end communication security on mobile devices for Governments and Enterprises, SMBs and Consumers.

KoolSpan’s TrustChip simply and intuitively transforms a standard smartphone, or any computing device, into a secure communication device. A purpose-built crypto processor designed into a standard microSD package, the TrustChip makes security an inherent part of the communication experience-as simple as connectivity itself.

The Kool Span TrustChip delivers a full suite of security services including key management, authentication and encryption. These capabilities are leveraged by application developers and OEMs via the TrustChip Developer Kit.

Because it is deployed in its own optimized hardware environment, KoolSpan’s high-performance TrustChip is insulated from threats that can reside in open platform and mobile host devices. This uniquely additive security processor provides a hardware-anchor to secure voice and other applications which harness the TrustChip’s power.

Learn more here: http://www.koolspan.com/

(We also most strongly recommend looking at Koolspan competitors like Wickr,  which started as a secure messenger but now also provides voice and video)