Security within the IPv6 protocol is based on the IPSec protocol. IPSec is available in both IPv4 and IPv6. As described in RFC 2460, a full implementation of IPv6 includes insertions of Authentication Headers (AH) and Encapsulating Security Payload (ESP) extension headers. Having IPSec on any IPv6 node should allow end-to-end security sessions.
For routers with IPv6 support, IPSec can be used in different areas:
OSPFv3— The Open Shortest Path First version 3 protocol (OSPFv3) uses AH and ESP extension headers as an authentication mechanism instead of the variety of authentication schemes and procedures defined in OSPFv2.
Mobile IPv6— This protocol specification is an IETF draft status proposed to use IPSec for binding update authentication. ...