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[Chen 2002] "Setuid Demystified"
[Dowd 2006] Chapter 9, "Unix I: Privileges and Files"
[Open Group 2004] setuid(), getuid(), seteuid()
[Tsafrir 2008] "The Murky Issue of Changing Process Identity: Revising 'Setuid Demystified'"
[Wheeler 2003] Section 7.4, "Minimize Privileges"
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