Patent ID: 8498416
Filing Date: 2013-07-30
Classification: H04L

Abstract:
1. A method for validating stored or incoming messages, comprising: determining, by a decoder of a mobile device, that a message was not successfully read after a first attempt, wherein the message was attempted to be read in the first attempt using first scrambling information; retaining the message as unreadable in a cache of the mobile device; obtaining second scrambling information related to the retained message at a scrambling information acquirer of the mobile device; attempting, by the decoder, to re-read the retained message with the second scrambling information from the cache; determining, by a message verifier of the mobile device, whether the attempt to re-read the retained message with the second scrambling information is successful; and if the attempt to re-read the retained message with the second scrambling information is successful, then determining, by the message verifier, that the first attempt was not successful because of a scrambling information change, and otherwise determining that the first attempt was not successful due to a reason different from the scrambling information change, wherein it is ascertained that the message was not successfully read after the first attempt due to the reason different from the scrambling information change if an attempt to re-read the retained message succeeds with the first scrambling information.