RFC 1825 (rfc1825) - Page 2 of 22
Security Architecture for the Internet Protocol
Alternative Format: Original Text Document
RFC 1825 Security Architecture for IP August 1995
Non-repudiation
The property of a receiver being able to prove that the sender
of some data did in fact send the data even though the sender
might later desire to deny ever having sent that data.
SPI
Acronym for "Security Parameters Index". An unstructured
opaque index which is used in conjunction with the
Destination Address to identify a particular Security
Association.
Security Association
The set of security information relating to a given network
connection or set of connections. This is described in
detail below.
Traffic Analysis
The analysis of network traffic flow for the purpose of
deducing information that is useful to an adversary.
Examples of such information are frequency of transmission,
the identities of the conversing parties, sizes of packets,
Flow Identifiers used, etc. [Sch94].
1.2 Requirements Terminology
In this document, the words that are used to define the significance
of each particular requirement are usually capitalised. These words
are:
- MUST
This word or the adjective "REQUIRED" means that the item is an
absolute requirement of the specification.
- SHOULD
This word or the adjective "RECOMMENDED" means that there might
exist valid reasons in particular circumstances to ignore this
item, but the full implications should be understood and the case
carefully weighed before taking a different course.
- MAY
This word or the adjective "OPTIONAL" means that this item is
truly optional. One vendor might choose to include the item
because a particular marketplace requires it or because it
enhances the product, for example; another vendor may omit the
same item.
Atkinson Standards Track