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Exam SSCP topic 1 question 166 discussion

Actual exam question from ISC's SSCP
Question #: 166
Topic #: 1
[All SSCP Questions]

What does the simple security (ss) property mean in the Bell-LaPadula model?

  • A. No read up
  • B. No write down
  • C. No read down
  • D. No write up
Show Suggested Answer Hide Answer
Suggested Answer: A 🗳️
The ss (simple security) property of the Bell-LaPadula access control model states that reading of information by a subject at a lower sensitivity level from an object at a higher sensitivity level is not permitted (no read up).
Source: KRUTZ, Ronald L. & VINES, Russel D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, John Wiley & Sons, 2001, Chapter 5:
Security Architectures and Models (page 202).

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Chosen Answer:
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mansour975
11 months, 2 weeks ago
Selected Answer: A
"No read up."
upvoted 1 times
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Rixster
1 year, 2 months ago
Selected Answer: A
The simple security (ss) property in the Bell-LaPadula model means "No read up." This property enforces that a subject (user or process) at a certain security level is not allowed to read data from objects at a higher security level.
upvoted 1 times
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JoseIRONMAN
2 years, 8 months ago
Selected Answer: B
The correct answer should be option B, no Write down. Correct?
upvoted 1 times
Jimmystra
2 years, 2 months ago
No, that is the star confidentiality rule.
upvoted 2 times
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...
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