Blackberry Corporation

John David Netto

Shu-Lin Chen

Michael Eoin Buckley

A secure cell broadcast method entails defining a group of mobile devices, reserving a channel for the group, associating cryptographic key material with the group, notifying the mobile devices of the channel for the group, securely providing the key material to the mobile devices of the group, and broadcasting on the channel a secure broadcast message that is encrypted such that the mobile devices of the group receiving on the channel can receive and decrypt the secure broadcast message using the key material.

Enhanced cell broadcast service via secure group broadcast

A method, device and a computer program product operable in a communications network to provide enhanced public warning system (PWS+) messages to a communication device over the current PWS system is disclosed. The method includes generating, at a server or network device, at least one public warning system (PWS) message and at least one enhanced PWS (PWS+) message, and associating the PWS+ message with the at least one PWS message. The at least one PWS+ message and the PWS message are transmitted via a communications network to the communication device.

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Nepean, Canada

John David Netto