Method and apparatus for transmitting secure cell broadcast messages in a cellular communication network

摘要

A method and apparatus is provided for transmitting a cell broadcast message in a mobile communication network comprising in a message control node receiving a initiation request identifying a first message payload segment to be transmitted, determining an authentication group for which the first message payload segment is intended and determining a first encryption key associated with the determined authentication group. The first message payload segment is encrypted using the first encryption key. A message payload is aggregated comprising the encrypted first message payload segment and at least a second message payload segment. The cell broadcast message comprising the aggregated message payload for message broadcast is transmitted within at least a part of the communication network. A method and apparatus is also provided for decrypting a cell broadcast message at a mobile terminal.

主权项

1. A method in a message control node for transmitting a cell broadcast message in a mobile communication network, the method comprising:
receiving an initiation request identifying a first message payload segment to be transmitted; determining an authentication group of mobile terminals for which the first message payload segment is intended; determining a first encryption key associated with the determined authentication group of mobile terminals; encrypting the first message payload segment using the first encryption key; aggregating a message payload comprising the encrypted first message payload segment and at least a second encrypted message payload segment, each message payload segment encrypted so that the determined authentication group of mobile terminals can decrypt the encrypted first message payload segment and a separate authentication group of mobile terminals can decrypt the second encrypted message payload segment, wherein the aggregated message payload comprises a first indicator allowing an end of the encrypted first message payload segment to be identified and/or a second indicator allowing an end of the second encrypted message payload segment to be identified by a receiving mobile terminal; and transmitting the cell broadcast message comprising the aggregated message payload for message broadcast within at least a part of the communication network, wherein the cell broadcast message includes multiple pages and each page further includes multiple paragraphs with parameters that specify length of each paragraph and wherein the encrypted first message payload segment and/or the second encrypted message payload segment is a paragraph of a page of the cell broadcast message.