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US 8,275,990 B2Granted
Method for receiving/sending multimedia messages
AssigneeInternational Business Machines Corporation
InventorsJun Shen, Song Song, Pei Sun, Jian Ming Zhang
Life of this patent
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Abstract
A method for receiving/sending multimedia message uses a wireless LAN, and communicates with a gateway via the wireless LAN so as to send and receive multimedia messages. Furthermore, the gateway of the invention detects whether the user device is located within the wireless LAN. If yes, then multimedia messages are sent and received via the wireless LAN; and if not, then via conventional telecom network. The invention also discloses a corresponding gateway and a corresponding user device.
Claims5
A method for receiving/sending a multimedia message, comprising steps of:
- receiving/sending the multimedia message between a multimedia messaging service (MMS) user device and a MMS gateway via a wireless LAN;
- and
- encrypting the multimedia message by:
- using the MMS gateway to perform:
- issuing a certificate to the MMS user device;
- sending a session ID and a master key encrypted by the MMS gateway's private key to the MMS user device in response to a request of said MMS user device having the certificate;
- generating a shared secret key using an algorithm combining the master key with the MMS user device's phone number and the session ID;
- and
- encrypting the multimedia message using the shared secret key;
- using the MMS user device to perform:
- decoding the master key received from the MMS gateway;
- and
- generating the shared secret key using the algorithm combining the decoded master key with the MMS user device's phone number and the session ID.
10 more elements
Dependencies are inferred from the claim text.