Abstract: The invention includes methods for authenticating access between devices when the devices are within a geospatial boundary comprising the first step of keeping track of the physical position of the devices using both low and, or high fidelity geospatial positioning techniques. Next, a first device determines whether any nearby mobile devices have entered the geospatial boundary. Next, the first device determines if any of the mobile devices are peers eligible for cryptographic authentication. After the first device authenticates that the other device within the geospatial boundary is a trusted peer, the devices may perform various data and, or dynamic policy operations.

Abstract: The invention includes methods for authenticating access between devices when the devices are within a geospatial boundary comprising the first step of keeping track of the physical position of the devices using both low and, or high fidelity geospatial positioning techniques. Next, a first device determines whether any nearby mobile devices have entered the geospatial boundary. Next, the first device determines if any of the mobile devices are peers eligible for cryptographic authentication. After the first device authenticates that the other device within the geospatial boundary is a trusted peer, the devices may perform various data and, or dynamic policy operations.

Abstract: Methods and apparatus are provided for secure communication techniques in a communication system. The system can include a first device which communicates with a second device over a channel. A security association can be established during a first session between the devices via an asymmetric key exchange. The security association comprises a Traffic Encryption Key (TEK) and a first state vector. The TEK comprises a shared, secret symmetric key. The security association is stored in each of the devices for use during a second session between the devices to expedite security association establishment during call set-up of the second session. The security association can be associated with the second device in the first device, and with the first device in the second device. An updated state vector can be generated at the first device. A second session can be established between the first device and the second device by using the TEKs from the first session and the updated state vector.

Abstract: Techniques are provided for secure group communications in a wireless dispatch system which includes a group of devices. The group of devices can include a first secure device which communicates with a plurality of second secure devices over a channel.