In mandatory access control, if a user is assigned the Secret (S) security class and relation is assigned the Confidential (C) security class, then the user is allowed to make modifications to the relation:
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- The Access to objects in the security design should be depend on more than one condition being satisfied. This principle reflect: Complete mediation Separation of privilege Least common mechanism IsolationConsider the following scenario: a user creates a new relation r1 that contains a foreign key that references another relation r2. The user requires what authorisation privileges on r2 in order to function properly. Why shouldn't this simply be permitted without the need for any such authorization?What is the relationship between an access control matrix and the integrity of the objects to which access is being controlled?
- What are thescenarios where deadlock can occur specify each?Define "authorization constraints" and "integrity constraints."Consider the scenario below: A user creates a new relation r1 with a foreign key referencing another relation r2. What authorization privileges does the user need on r2 for effective operation? Why should this not be permitted without such authorization?
- Design a class which provides a lock only if there are no possible deadlocksA Digital Certificate is a computer file that contains a set of information regarding the entity to which the certificate was issued. Based on the definition of digital signature, carefully analyze the statements below: I. The signatures contained in a certificate are attestations made by an entity that claims to trust the data contained in that certificate;II. The Certification Authority is normally part of the Public Key Infrastructure;III. The digital certificate is not signed by the Certification Authority (CA);IV. The digital certificate is signed by the Certificate Authority (CA) that issued it;V. The digital certificate is signed by the Public Key Infrastructure that issued it. The correct answer: A) Only statements I, II and III are correct;B) Only statements I, II and IV are correct;C) Only statements I, III and V are correct;D) All statements are correct;E) Only statements II, III and V are correct.native:Another action may be triggered by the execution of a trigger. There is often a limit on how deep nesting may go in database systems. Why could they impose such a restriction?
- An instance of a relation A. is serializable B. is dynamic C. is static D. is never emptyBriefly describe the techniques for dealing with deadlocks.A program called lsu [104] gives access to role accounts. The user's access rights are checked, and the user is required to enter her password. If access rules allow the change and the user's password is correct, lsu allows the change. Given that Mary uses lsu from her account, why does lsu require her to enter her password? Name the principles involved, and why they require this