Which TCSEC level is labeled Controlled Access Protection?

A. C1

B. C2

C. C3

D. B1








 

Suggested Answer: B

Community Answer: D

C2 is labeled Controlled Access Protection.
The TCSEC defines four divisions: D, C, B and A where division A has the highest security.
Each division represents a significant difference in the trust an individual or organization can place on the evaluated system. Additionally divisions C, B and A are broken into a series of hierarchical subdivisions called classes: C1, C2, B1, B2, B3 and A1.
Each division and class expands or modifies as indicated the requirements of the immediately prior division or class.
D  Minimal protection -
Reserved for those systems that have been evaluated but that fail to meet the requirements for a higher division
C  Discretionary protection -
C1  Discretionary Security Protection
Identification and authentication
Separation of users and data -
Discretionary Access Control (DAC) capable of enforcing access limitations on an individual basis
Required System Documentation and user manuals
C2  Controlled Access Protection
More finely grained DAC -
Individual accountability through login procedures
Audit trails -
Object reuse -
Resource isolation -
B  Mandatory protection -
B1  Labeled Security Protection -
Informal statement of the security policy model
Data sensitivity labels -
Mandatory Access Control (MAC) over selected subjects and objects
Label exportation capabilities -
All discovered flaws must be removed or otherwise mitigated
Design specifications and verification
B2  Structured Protection -
Security policy model clearly defined and formally documented
DAC and MAC enforcement extended to all subjects and objects
Covert storage channels are analyzed for occurrence and bandwidth
Carefully structured into protection-critical and non-protection-critical elements
Design and implementation enable more comprehensive testing and review
Authentication mechanisms are strengthened
Trusted facility management is provided with administrator and operator segregation
Strict configuration management controls are imposed
B3  Security Domains -
Satisfies reference monitor requirements
Structured to exclude code not essential to security policy enforcement
Significant system engineering directed toward minimizing complexity
Security administrator role defined
Audit security-relevant events -
Automated imminent intrusion detection, notification, and response
Trusted system recovery procedures
Covert timing channels are analyzed for occurrence and bandwidth
An example of such a system is the XTS-300, a precursor to the XTS-400
A  Verified protection -
A1  Verified Design -
Functionally identical to B3 -
Formal design and verification techniques including a formal top-level specification
Formal management and distribution procedures
An example of such a system is Honeywell's Secure Communications Processor SCOMP, a precursor to the XTS-400
Beyond A1 -
System Architecture demonstrates that the requirements of self-protection and completeness for reference monitors have been implemented in the Trusted
Computing Base (TCB).
Security Testing automatically generates test-case from the formal top-level specification or formal lower-level specifications.
Formal Specification and Verification is where the TCB is verified down to the source code level, using formal verification methods where feasible.
Trusted Design Environment is where the TCB is designed in a trusted facility with only trusted (cleared) personnel.
The following are incorrect answers:
C1 is Discretionary security -
C3 does not exists, it is only a detractor
B1 is called Labeled Security Protection.
Reference(s) used for this question:
HARE, Chris, Security management Practices CISSP Open Study Guide, version 1.0, april 1999. and
AIOv4 Security Architecture and Design (pages 357 - 361)
AIOv5 Security Architecture and Design (pages 358 - 362)

This question is in SSCP Systems Security Certified Practitioner Exam
For getting Systems Security Certified Practitioner (SSCP) Certificate






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