From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Thu, 22 Dec 2005 16:45:07 -0500 From: "schaufler-ca.com - Casey Schaufler" Message-Id: <200512222145.jBMLj7H0008704@luminouswebdesign.com> To: SELinux@tycho.nsa.gov Subject: Re: [RFC] SELinux file_ioctl hook permission checks changes MIME-Version: 1.0 Sender: owner-selinux@tycho.nsa.gov List-Id: selinux@tycho.nsa.gov --- abreeves wrote: > Alles > ... we have not investigated the full history of > distinguished op. systems of the past as to what > they could tell us. > ... TOPS-20 ... > ... > I wonder > if any of you gurus had ever tho't about this Oh my, yes indeedy. Have a look at the P1003.1e/2c DRAFT document. It's chuck full of revealing insights about what and why TOPS-20, Multics, VMS, and System370 have contributed to the security architecture of open (was system, now source) kernels. None of it's done out in so many words, mind you, but the rationale section for ACLs by itself will probably leave you wondering how the bureaucracy of the Holy Roman Empire manages to have such influence in modern OS design. > ... Think about it. To answer the TOPS-20 4-way model question more directly, the ogw 3-way model is good enough for anything that doesn't need to be fully general, and the 4-way just doesn't add that much value. ACLs are (intended to be) completely general, and when it came down to making changes consensus was clearly on the side of going all the way to generality. > Allen B. Reeves, former NSAer. ------------------------ Casey Schaufler casey@schaufler-ca.com 650.906.1780 -- This message was distributed to subscribers of the selinux mailing list. If you no longer wish to subscribe, send mail to majordomo@tycho.nsa.gov with the words "unsubscribe selinux" without quotes as the message.