U
untrusted process process that has not been evaluated or
examined for adherence to the security policy. It may
include incorrect or malicious code that attempts to
circumvent the security mechanisms.
user person or process accessing a system by direct or indi-
rect connections. Considered by many experts to be
the entity responsible for the greatest range of secu-
rity problems.
user ID unique symbol or character string that is used by a
system to identify a specific user
user profile patterns of a user’s activity that can be used to
detect changes in normal routines
usual suspect the term is, as the saying has it,“known to
the police,” and is probably most famous from the
1942 version of Casablanca, in which Capt. Renault
(Claude Rains) keeps repeating ...