Data transfer rate is more in wireless network as compared to wired network .Wireless network gives more advantageous because its support feature such as versatility, portability, open medium, simple to design. MANETs and WSN are the most common forms of Wireless media. In MANETs nodes are deployed or distributed in Ad-hoc way and they are communicating or exchange message using wireless Transmission. Security is a measure concern in Mobile Ad-hoc Network because MANETs having wide distribution of node & open medium it becomes vulnerable to malicious attackers very fast. Now we recommend and execute more powerful and secure intrusion detection system named Improved EAACK designed for MANETs. Improved EAACK schema uses concepts such as hybrid cryptography & bouncing theory for reducing network overhead & removing unwanted node and forward traffic through a precise location. Performance is measured using Packet Delivery Ratio & Routing Overhead.