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Printable Version: RFC1244.PDF
RFC 1244 Site Security Handbook July 1991
9800 Savage Road
Ft Meade, MD 20755-6000
CSC = Computer Security Center:
an older name for the NCSC
NTISS = National Telecommunications and
Information Systems Security
NTISS Committee, National Security Agency
Ft Meade, MD 20755-6000
[CSC]
Department of Defense, "Password Management Guideline",
CSC-STD-002-85, 12 April 1985, 31 pages.
The security provided by a password system depends on
the passwords being kept secret at all times. Thus, a
password is vulnerable to compromise whenever it is used,
stored, or even known. In a password-based authentication
mechanism implemented on an ADP system, passwords are
vulnerable to compromise due to five essential aspects
of the password system: 1) a password must be initially
assigned to a user when enrolled on the ADP system;
2) a user's password must be changed periodically;
3) the ADP system must maintain a 'password
database'; 4) users must remember their passwords; and
5) users must enter their passwords into the ADP system at
authentication time. This guideline prescribes steps to be
taken to minimize the vulnerability of passwords in each of
these circumstances.
[NCSC1]
NCSC, "A Guide to Understanding AUDIT in Trusted Systems",
NCSC-TG-001, Version-2, 1 June 1988, 25 pages.
Audit trails are used to detect and deter penetration of
a computer system and to reveal usage that identifies
misuse. At the discretion of the auditor, audit trails
may be limited to specific events or may encompass all of
the activities on a system. Although not required by
the criteria, it should be possible for the target of the
audit mechanism to be either a subject or an object. That
is to say, the audit mechanism should be capable of
monitoring every time John accessed the system as well as
every time the nuclear reactor file was accessed; and
likewise every time John accessed the nuclear reactor
file.
Site Security Policy Handbook Working Group [Page 96]