The Research And Implementation Of The IP Security Protocols

The networks security problems has raised more and more with the rapid development of Internet technolege. Data are transferring through the Internet in the risks of being snifferred, altered or faked. IPSec ( IP Security ) is a protocol suite that providing security services on the IP layer. IPSec is the only protocol that can give security guarantee for any communication in the Internet.This dissertation firstly introduces the present situation of the networks security research and the predominance of implement security in the IP layer. Then the second chapter researches the principle of the IPSec, which provide security services through AH and ESP protocols. Both AH and ESP can work under two working mode: transferring mode and tunnel mode.The third chapter gives the implement of the IPSec under the Linux, including AH/ESP module and encryption/authentication module.IPSec can meet many security needs. The fourth chapter introduces the application of IPSec in the virtual private network ( VPN ) and Mobile IP security.At last, the dissertation summarizes the works in the past, and bring out proposals for the future work.