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Which statement below is accurate about the concept of Object Reuse?

Which statement below is accurate about the concept of Object Reuse?

PrepAway - Latest Free Exam Questions & Answers

A.
Object reuse protects against physical attacks on the storage medium.

B.
Object reuse applies to removable media only.

C.
Object reuse controls the granting of access rights to objects.

D.
Object reuse ensures that users do not obtain residual information from system resources.

Explanation:
Object reuse mechanisms ensure system resources are allocated and reassigned among authorized
users in a way that prevents the leak of sensitive information, and ensure that the authorized user of
the system does not obtain residual information from system resources. Object reuse is defined as
The reassignment to some subject of a storage medium (e.g., page frame, disk sector, magnetic
tape) that contained one or more objects. To be securely reassigned, no residual data can be
available to the new subject through standard system mechanisms.7 The object reuse requirement
of the TCSEC is intended to assure that system resources, in particular storage media, are allocated
and reassigned among system users in a manner which prevents the disclosure of sensitive
information. Answer a is incorrect. Object reuse does not necessarily protect against physical attacks
on the storage medium. Answer c is also incorrect, as object reuse applies to all primary and
secondary storage media, such as removable media, fixed media, real and virtual main memory
(including registers), and cache memory. Answer d refers to authorization, the granting of access
rights to a user, program, or process. Source: NCSC-TG-018, A Guide To Understanding Object Reuse
in Trusted Systems [Light Blue Book].


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