ارائه يک روش جامع براي هم‌زمانی امن در شبکه‌هاي حسگر بي‌سيم
الموضوعات :
1 - دانشگاه صنعتی اصفهان
2 - دانشگاه صنعتی اصفهان
الکلمات المفتاحية: شبکه حسگر هم‌زماني هم‌زماني امن حمله تأخير پالس احراز اصالت گره‌هاي تسخيرشده.,
ملخص المقالة :
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.
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