All, I have released a new paper entitled: Covert Channels in the TCP/IP Protocol Suite This paper demonstrates several methods of encoding secret data into the headers of the TCP/IP protocol. Main topics of interest include: - Encoding data into IP headers. - Encoding data into TCP headers. Specific areas of focus allow encoding of data into the IP identification fields and TCP sequence number fields for clandestine transmission of data to a remote host. Packets of data appear normal to network sniffers and packet filters, yet can contain hidden messages in either plaintext or ciphertext. Other methods revealed include a new technique where forged packets can be "bounced" off any Internet connected site to establish a communication path that appears to originate from the "bounced" host. Additionally, several methods are discussed regarding bypassing of packet filters with encoded data for communication with hosts inside a protected network. This paper contains actual demonstrations as well as source code for Linux 2.x systems to allow encoded transmissions between sites to be tested. If you are interested in reading this paper, please visit my website: http://www.psionic.com/papers.html This site has VERY limited bandwidth so please be patient if it is slow. Thank you for your time.. -- Craig