ESP es una cabecera IP para proporcionar a los
paquetes IP que viajan por la red servicios de confidencialidad, autenticación
del origen, integridad de la conexión, anti-replay y, en cierta medida,
inmunidad al análisis de tráfico.
(I) An Internet protocol
[R2406, R4303] designed to provide data confidentiality service and other
security services for IP datagrams. (See: IPsec. Compare:
AH.) [RFC4949:2007]
an IP-based protocol
providing confidentiality services for data. Specifically, ESP provides
encryption as a security service to protect the data content of the IP packet. ESP is an Internet standard (RFC 2406). [ISO-18028-4:2005]
The Encapsulating Security
Payload (ESP) header is designed to provide a mix of security services in IPv4
and IPv6. ESP may be applied alone, in
combination with the IP Authentication Header (AH).
ESP is used to provide
confidentiality, data origin authentication, connectionless integrity, an
anti-replay service (a form of partial sequence integrity), and limited traffic
flow confidentiality.
http://www.ietf.org/rfc/rfc4303