eng Science and Education Publishing Journal of Computer Sciences and Applications 2328-725X 2016-05-26 3 4 90 93 10.12691/jcsa-3-4-1 JCSA2015341 article Ahmed Ibrahim 1 Nagy E Zaki dr_nagy_ezzat@yahoo.com 2 Department of Computer Science, Modern Academy, Cairo, Egypt Department of Computer, Science Arab Academy for Science, Technology & Maritime Transport, Cairo, Egypt A Mobile Ad hoc Network is a collection of two or more devices connect with another nodes with flexibility and nodes can connect and leave the network easily. The unreliability of wireless networks lack on infrastructure and a lot of attacks can communicate with the wireless network. In the Black hole attack, the malicious node absorbs the data. MANET Disadvantages all packets and traffic in the network are dropped by Black hole node. Black hole node has the shortest path in the entire network by sending fake route reply. In this paper, propose the effect of the Black hole attack on the network performance using AODV protocol. The proposed process uses the AODV Encryption decryption to detect the Black hole attack. AODV Encryption decryption is modification of AODV protocol to reduce the effect of Black hole attack by adding Encrypt/Decrypt function in AODV protocol. http://pubs.sciepub.com/jcsa/3/4/1/jcsa-3-4-1.pdf MANET Security AODV Routing Protocol ns-2 Wireless Ad hoc Networks Attacks in Wireless Ad hoc Network solution to black hole attack