Detection of Packet Length Based Network Steganography

Network Steganography which uses length of the packets for hiding the secret data are getting more importance day by day. Various steganographic algorithms have been proposed which embeds the data length modulating sequence of packet lengths with secret data stream. In this paper, a network steganalysis scheme has been proposed which can detect the presence of steganographic embedding by modifying the length of the UDP datagrams. Experimental results show that proposed detection scheme can detect packet length based network steganography with considerable accuracy.