ارائه يک روش جامع براي هم‌زمانی امن در شبکه‌هاي حسگر بي‌سيم
محورهای موضوعی : مهندسی برق و کامپیوترزهرا احمدی 1 * , مهدی برنجکوب 2
1 - دانشگاه صنعتی اصفهان
2 - دانشگاه صنعتی اصفهان
کلید واژه: شبکه حسگر هم‌زماني هم‌زماني امن حمله تأخير پالس احراز اصالت گره‌هاي تسخيرشده.,
چکیده مقاله :
يكي از نیازمندی‌هاي مهم شبكه حسگر، سرويس هم‌زماني است. اهميت زمان در شبکه‌هاي حسگر باعث شده که اخلال در هم‌زماني حسگرها يکي از اهداف اوليه دشمن براي حمله به اين شبکه‌ها باشد. دشمن سعي مي‌كند به طرق مختلف مانند اخلال در رسيدن پيغام‌هاي هم‌زماني، تغيير يا جعل آنها، تأخيردادن به پيغام‌هاي حساس به زمان، تسخير برخي گره‌ها و ارسال پيغام‌هاي هم‌زماني غلط توسط آنها مانع از هم‌زماني صحيح در شبكه شود. علي‌رغم معرفي چند روش هم‌زماني براي شبکه‌هاي حسگر در سال‌هاي اخير، تا کنون روش هم‌زماني جامعي که بتواند نيازمندي‌هاي امنيتي و کارامدي اين شبکه‌ها را توأمان برآورده کند، ارائه نشده است. در اين مقاله روشي براي هم‌زماني امن شبکه حسگر ارائه شده که با وجود سربار ارتباطي و محاسباتي کم و دقت مناسب، در مقابل حملات داخلي و خارجي به اين شبکه‌ها مقاوم است. نتايج تحليل و شبيه‌سازي، گوياي برتري روش پيشنهادي بر روش‌هاي در دسترس است.
One of the important requirements of sensor networks is synchronization of the nodes. The importance of time in sensor networks causes the adversary tries to disturb time synchronization by altering and faking messages, delaying or replying them, compromising the nodes and sending false messages via them. Up to now, there is no method that is able to provide both synchronization and security needs of sensor networks simultaneously. In this paper, we suggest a method that is capable to provide precise synchronization, along with low communication and computational overhead, low convergence time and high security against internal and external attacks. Simulation and analytic results show the preference of our method compared to other available methods.
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