Patent ID: 8484472

Claim:
A method in a subscriber device for filtering unsolicited notification messages, the method comprising: generating, at a subscriber device, a subscriber secure correlation identifier (SCID) associated with a subscription to a subscribed event source, wherein the subscriber SCID comprises a randomized correlation identifier and a secure tag, wherein the secure tag is generated using the randomized correlation identifier and a device encryption key associated with the subscriber device; and providing the subscriber SCID to the subscribed event source in a subscription message; receiving, at the subscriber device, a notification message upon occurrence of an event, the notification message having an event-source SCID comprising a first portion and a second portion; verifying, in the subscriber device, that the notification message is from the subscribed event source if the second portion of the event-source SCID is equal to a secure hash of the first portion of the event-source SCID, wherein the secure hash is generated using the first portion and the device encryption key; and accepting the notification message if the notification message is verified as being from the subscribed event source.