Simple Security Property
Also called: no read up
Course: AP® Cybersecurity Shows up in: Unit 5: Securing Applications and Data
The Bell-LaPadula rule that a subject may not read objects above its own security level.
Appears in the course and exam description (CED): 5.2.C.6
Why it matters in Unit 5
Together with the Star Security Property it gives the summary “write up, read down”.
Example
A user cleared for Confidential cannot open a Secret file.
Learn it properly, with a checkpoint 5.2 Protecting Applications and Data: Managerial Controls and Access Controls