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Determining a session encryption key during a broadcast/multicast service session using secure real-time transport protocol

An encryption key and multicast service technology, applied in the field of session encryption key, can solve problems such as difficulty in determining a new session key and increasing the randomness of the session key

Active Publication Date: 2011-08-10
QUALCOMM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Also, there is a need to increase the randomness of updating the session key, thereby making it more difficult for an unauthorized WCD to determine what the new session key is

Method used

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  • Determining a session encryption key during a broadcast/multicast service session using secure real-time transport protocol
  • Determining a session encryption key during a broadcast/multicast service session using secure real-time transport protocol
  • Determining a session encryption key during a broadcast/multicast service session using secure real-time transport protocol

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Embodiment Construction

[0018] The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or convenient over other implementations.

[0019] figure 1 A communication system 100 constructed in accordance with the present invention is shown. Communication system 100 includes infrastructure 101 , a plurality of wireless communication devices (WCDs) 104 and 105 , and landline communication devices 122 and 124 . WCDs are also known as mobile stations or mobile stations. In general, WCDs can be mobile or fixed.

[0020] Infrastructure 101 also includes other components, such as base stations 102, base station controllers 106, mobile switching centers 108, switching networks 120, and so on. In one embodiment, base station 102 is integrated with base station controller 106, while in other embodiments base station 102 and base station controller 106 are separate components. ...

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Abstract

The invention provides a method and a device for determining a session encoding key during broadcast and multicast service by using a safety real-time transmission protocol (SRTP). The method and the device comprise the step of receiving serial number during a session. The serial number and a loop counter with a predetermined value are used for calculating packet indices. Subsequently, a primary key and the packet indices are used for determining the session key.

Description

technical field [0001] The present invention relates generally to wireless communications, and more particularly to determining session encryption keys for secure real-time transmissions. Background technique [0002] Broadcast or multicast services relate to communication systems for transmitting information from a sender to multiple receivers or users. Examples of broadcast or point-to-multipoint communication systems include dispatch systems such as those used by the police, truck companies, and taxi companies, where a central dispatcher broadcasts a signal to one or more vehicles. The broadcast signal can be directed to a specific vehicle or to all vehicles simultaneously. [0003] As mobile radio networks, such as cellular telephone networks, have become commonplace, users have come to desire to receive multimedia broadcasts, such as video and teleconferencing, over wireless communication links using the Internet Protocol (IP). For example, users wish to be able to re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06
CPCH04L9/0861H04L2209/80H04L63/068H04L63/06H04L9/0891H04L63/0428H04L2463/061
Inventor R·T-S·苏J·王
Owner QUALCOMM INC
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