• pankaj
• Shikha Verma

In applications with low infrastructural elements, a MANET becomes highly vulnerable to security attacks. These attacks can be active or passive in nature. Active attacker including ‘Black-hole’, ‘Grey-hole’ and ‘Worm-hole’; can modify, listen and inject messages in communication channel. Whereas, a passive attacker does not alter the information; but secretly listens to valuable information i.e. spoofing. Jellyfish attack is one of the illustrations of a passive attack. Jellyfish conforms to all routing and forwarding protocol specifications. A Jellyfish attacker possesses the property that it is difficult to detect until after the sting. Jellyfish attacker targets closed loops and misguide the packets to adversely affect the network performance. A Jellyfish attack can attack the network in 3-ways Jellyfish-reorder-attack, Jellyfish-periodic-dropping-attack and Jellyfish-delay-variance-attack. In Jellyfish Delay Variance (JFDV) attack, attacker node receives the packets from source side and adds delay while forwarding the packets to receiver.

Jellyfish, MANET, Black-hole, Grey-Hole

"A Review on different Types of Active and Passive attacks in MANET", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 6, page no.594-598, June-2018, Available :http://www.jetir.org/papers/JETIR1806209.pdf

"A Review on different Types of Active and Passive attacks in MANET", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 6, page no. pp594-598, June-2018, Available at : http://www.jetir.org/papers/JETIR1806209.pdf