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355851
U3.2 Access Control Structures
Descrição
Masters Comp Sec Mapa Mental sobre U3.2 Access Control Structures, criado por Craig Parker em 13-11-2013.
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comp sec
comp sec
masters
Mapa Mental por
Craig Parker
, atualizado more than 1 year ago
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Criado por
Craig Parker
mais de 10 anos atrás
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Resumo de Recurso
U3.2 Access Control Structures
Access Control Matrix
Based on a grid. Subjects on the side, objects accross
Not practical for large organisations with 100's of subjects and 10000's of objects, to many empty spaces and wasted memory
Access Control List
Concentrate on objects
ACL for object is stored within the object
Checked before access is granted
More widely used than Matrix
Used by UNIX
Main disadvantage is checking the list is time consuming, if access is revoked for a user then every object has to be checked for that user
Capability list
Focus on access rights of Subjects
Concentrate on the rows of a matrix
Used in databases
Disadvantages
difficult to ascertain the rights to an object
difficult to revoke permissions if owner has granted certain rights to subjects
How does the Reference Monitor ascertain which subjects have access to which objects?
Anexos de mídia
acces_ctrl_matrix.JPG (image/JPG)
ACL.JPG (image/JPG)
Capability_list.JPG (image/JPG)
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