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Researchers have suggested that, instead of having an access list associated with each file (specifying which users can access the file, and how), we should

Researchers have suggested that, instead of having an access list associated with each file (specifying which users can access the file, and how), we should have a user control list associated with each user (specifying which files a user can access, and how). Discuss the relative merits of these two schemes.

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