Encrypted traffic and IPsec challenges for intrusion detection system

Now a day IPsec has now become a standard information security technology throughout the Network and Internet society. It provides confidentiality, authentication, integrity, secure key exchange and protection mechanism though encrypting a packet. The use of IPsec, which encrypts network traffic, renders network intrusion detection, virtually useless, unless traffic is decrypted at network layer. In this paper we are discussing that how a IPSec or other encryption techniques create challenges for Intrusion Detection System. © 2013 Springer