IP Security Architecture specification is quite complex defined in numerous rfcs inc|.RFC2401/2402/2406/2408 many others, grouped by category mandatory in IPv6, optional in IPV4 have two security header extensions Authentication Header(AH) Encapsulating Security Payload(ESP) 復大软件学院8 IP Security Architecture • specification is quite complex • defined in numerous RFC’s – incl. RFC 2401/2402/2406/2408 – many others, grouped by category • mandatory in IPv6, optional in IPv4 • have two security header extensions: – Authentication Header (AH) – Encapsulating Security Payload (ESP)