ACL vs Access control matrix

[Pemasiri Devanarayana]

Hi All,

Can someone advise how Access Control List differentiate from the Access Control Matrix. Every time these two are almost similar meaning and thereby confusing :) 

Regards,

Pemasiri

[Chris.J....@fluor.com]

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[SK]

Enclosed might help.

Access matrix - a two dimension table where the first column represent Subjects and the bottom :

Subject/Object name	aaa	bbb	ccc	ddd
Alice	R/W	R	R	-
Bob	R	R/W		R
Carol	R	R	R/W	R
Dave		R/W	R/W	R

Reading the above Access Matrix table, ACL (Access Control list ) will be the column (Object ) data : ( defining subject access for each object )

aaa -- Alice:R/W, Bob:R, Carol:R
bbb -- Alice:R, Bob:R/W, Carol:R, Dave:R/W
ccc -- Alice:R, Carol:R/W, Dave:R/W
ddd -- Bob:R, Carol:R, Dave:R

Capability list ( opposite of ACL - defining object access for each Subject )

Alice -- aaa:R/W, bbb:R, ccc:R
Bob -- aaa:R, bbb:R/W, ddd:R
Carol -- aaa:R, bbb:R, ccc:R/W, ddd:R
Dave -- bbb:R/W, ccc:R/W, ddd:R

Hope this help. Corrections always welcome.

Thanks

[Pemasiri Devanarayana]

Thanks SK for sharing these information and its help to understand the difference.

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