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In mobile communication, the key factor that affects the performance of a good security protocol is the timeliness of the security components of the transactions. Even though, there are mathematically well-established rigid security algorithms and implementation mechanisms available in the market, it is very difficult to predict the events in a mobile communication mechanism. This timeliness of the information exchange between two mobile nodes involved in any mobile wireless communication has led to various attempts to innovate good rigid security mechanisms that shall also take care of the time domain factors. Non repudiation protocols are designed in such a way that two agents were involved in transactions shall never be able to repudiate and deny the involvement at a later point of time.
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