Propagation of messages

A mobile device able to communicate via both an ad-hoc wireless network and a cellular network, the device being adapted for communication with at least one other device for the receipt of digital media items transmitted using said ad-hoc wireless network, each digital media item including content, the device having a digital media application controlling presentation or transmission of said content to a user, said application being adapted such that on receipt, presentation or forwarding of a digital media item by said device, one or more messages relating to incentives for receiving, presenting or forwarding said digital media item in the ad-hoc wireless network are sent to an administration system via said cellular network;

• wherein said mobile device is configured to seek an authentication which serves to confirm that no tampering with metadata representative of at least one aspect of the digital media item has occurred since creation of the digital media item.

A mobile device able to communicate via both an ad-hoc wireless network and a cellular network, the device being adapted for communication with at least one other device for the receipt of digital media items transmitted using said ad-hoc wireless network, each digital media item including content, the device having a digital media application controlling presentation or transmission of said content to a user, said application being adapted such that on receipt, presentation or forwarding of a digital media item by said device, one or more messages relating to incentives for receiving, presenting or forwarding said digital media item in the ad-hoc wireless network are sent to an administration system via said cellular network

• wherein said mobile device is configured to seek an authentication which serves to confirm that no tampering with the content has occurred since creation of the digital media item.

A system for the propagation of messages to multiple mobile recipient devices each having both ad-hoc wireless and cellular capability, the system comprising:

• at least one message generation platform having a content creation engine and a metadata inserter adapted to insert metadata representative of at least a forward incentive value, the message generation platform being adapted for communication with said multiple mobile recipient devices;
• and
• a client application on each recipient device controlling viewing of the message, said application operating a forward message policy adapted such that on receipt of a message at the mobile device, forward incentive value metadata is tested against the policy for that device and the message forwarded via an ad-hoc wireless network by that device or not in accordance with said test.

A mobile device having both ad-hoc wireless and cellular capability, the device being adapted to receive messages, each message comprising content and metadata including at least forward incentive value metadata, the device having a client application controlling viewing of messages, said application operating a forward message policy adapted such that on receipt of a message, forward incentive value metadata is tested against said policy and the message forwarded by wireless re-broadcast by that device or not in accordance with said test.

A mobile device able to communicate via both an ad-hoc wireless network and a cellular network, the device being adapted for communication with at least one other device for the receipt of digital media items transmitted using said ad-hoc wireless network, each digital media item including content, the device having a digital media application controlling presentation or transmission of said content to a user, said application being adapted such that on receipt, presentation or forwarding of a digital media item by said device, one or more administration messages relating to said digital media item are sent to an administration system via said cellular network, wherein metadata includes an incentive value and wherein the client application is adapted to compare the incentive value with a stored threshold incentive value before viewing of the message at the mobile device.