System and Method for Determining Trust for SIP Messages
First Claim
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1. A method for determining if a message received from a node in an IP (Internet Protocol) Multimedia Subsystem (IMS) network can cause one or more actions to be performed, comprising:
- a user agent (UA) receiving from the network node a message containing a trust indicator;
the UA determining whether the trust indicator matches trust information stored in the UA;
when the trust indicator matches trust information stored in the UA, the UA performing all actions typically associated with receipt of the message; and
when the trust indicator does not match trust information stored in the UA, the UA refraining from performing at least one action typically associated with receipt of the message.
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Abstract
A method for performing registration is provided. The method includes receiving a server timeout message, the server timeout message including at least a field set to a value equal to a value received during a first registration. The method further includes initiating restoration procedures by performing a second registration in response to receiving the server timeout message.
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Citations
34 Claims
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1. A method for determining if a message received from a node in an IP (Internet Protocol) Multimedia Subsystem (IMS) network can cause one or more actions to be performed, comprising:
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a user agent (UA) receiving from the network node a message containing a trust indicator; the UA determining whether the trust indicator matches trust information stored in the UA; when the trust indicator matches trust information stored in the UA, the UA performing all actions typically associated with receipt of the message; and when the trust indicator does not match trust information stored in the UA, the UA refraining from performing at least one action typically associated with receipt of the message. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A user agent (UA), comprising:
a processor configured to receive, from a node outside a trust domain in an IP (Internet Protocol) Multimedia Subsystem (IMS) network, a message containing a trust indicator, further configured to determine whether the trust indicator matches trust information stored in the UA, further configured, further configured, when the trust indicator matches trust information stored in the UA, to perform all actions typically associated with receipt of the message, and further configured, when the trust indicator does not match trust information stored in the UA, to refrain from performing at least one action typically associated with receipt of the message. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for determining if a node outside a trust domain in an IP (Internet Protocol) Multimedia Subsystem (IMS) network can be trusted, comprising:
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a user agent (UA) receiving a message from the network node; the UA determining whether a trust indicator is present in the message; when the trust indicator is present in the message, the UA performing all actions typically associated with receipt of the message; and when the trust indicator is not present in the message, the UA refraining from performing at least one action typically associated with receipt of the message. - View Dependent Claims (28, 29, 30)
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31. A user agent (UA), comprising:
a processor configured to receive a message from a node outside a trust domain in an IP (Internet Protocol) Multimedia Subsystem (IMS) network, further configured to determine whether a trust indicator is present in the message, further configured, when the trust indicator is present in the message, to perform all actions typically associated with receipt of the message, and further configured, when the trust indicator is not present in the message, to refrain from performing at least one action typically associated with receipt of the message. - View Dependent Claims (32, 33, 34)
Specification