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diff --git a/Hurd/HowMuchConfinementDoWeWant.mdwn b/Hurd/HowMuchConfinementDoWeWant.mdwn deleted file mode 100644 index 663e5bbb..00000000 --- a/Hurd/HowMuchConfinementDoWeWant.mdwn +++ /dev/null @@ -1,93 +0,0 @@ -# <a name="How_Much_Confinement_Do_We_Want_"> How Much Confinement Do We Want? </a> - -**_NOTE:_** **I am absolutely sure this is incredibely incomplete and/or wrong.** **_This is not up to date!_** - -## <a name="Introduction"> Introduction </a> - -There has been a lot of traffic on the l4-hurd list lately. A good bit of this is related to the question this entry is about: How much confinement do we want? The idea not to implement the full confinement was (accidently?) raised by marcus, who planned to raise it _somewhen_, but not yet. - -## <a name="Terminology"> Terminology </a> - -In this section I try to sketch some terminology that came up _during_ the discussion. - -### <a name="Creator"> Creator </a> - -Creator we call the creator of the confined (constructor) object.[2] - -### <a name="Instantiator"> Instantiator </a> - -Instantiator we call the user of the confined (constructor) object. [2] - -### <a name="Encapsulation"> Encapsulation </a> - -Encapsulation means that information (including authority) cannot be extracted from a program without its consent. This is a restriction on "read in" behavior. [3] - -### <a name="Confinement"> Confinement </a> - -Confinement means that a program cannot communicate outward through unauthorized channels. This is a restriction on "write out" behavior. [3] - -### <a name="non_trivial_confinement"> non-trivial confinement </a> - -Marcus: \`\`[non-trivial confinement] is the confined constructor design pattern.'' [1] - -We speak about non-trivial confinement when creator != instantiator. [2] - -### <a name="trivial_confinement"> trivial confinement </a> - -Marcus: \`\`[trivial confinement] is what the Hurd will do'' [1] - -We speak about trivial confinement when creator == instantiator [2] - -### <a name="principle_of_user_freedom_autono"> principle of user freedom/autonomity </a> - -The principle of user freedom and autonomity means the right to use, inspect, alter and copy all resources attributed to/owned by the user.[4] - -### <a name="freedom_of_digital_information"> freedom of digital information </a> - -TBD - -## <a name="The_Positions"> The Positions </a> - -Here I try to sketch the different positions. - -### <a name="Use_and_Implement_Only_Trivial_C"> Use and Implement Only Trivial Confinement by Default </a> - -#### <a name="Pros"> Pros </a> - -* Follows the principle of user freedom -* **add more here** - -#### <a name="Cons"> Cons </a> - -* Possibly use cases for non-trivial confinement exist we cannot yet think of. -* **add more here** - -### <a name="Implement_Full_Confinement_and_U"> Implement Full Confinement and Utilize It </a> - -#### <a name="Pros"> Pros </a> - -* There are many years of experience with confinement. -* **add more here** - -#### <a name="Cons"> Cons </a> - -* It does not follow the principle of user freedom. -* **add more here** - -## <a name="Preliminary_Summary_Statements"> Preliminary Summary Statements </a> - -* [Jonathan](http://lists.gnu.org/archive/html/l4-hurd/2006-05/msg00018.html) - -## <a name="A_Try_to_Push_the_Discussion_int"> A Try to Push the Discussion into a Constructive Direction </a> - -Marcus started a challenge [5] to find a use case for non-trivial confinement that is interesting for the Hurd and cannot be implemented otherwise. The exact challenge definition can be found in the mail. - ----- - -* [1] <http://lists.gnu.org/archive/html/l4-hurd/2006-04/msg00339.html> -* [2] <http://lists.gnu.org/archive/html/l4-hurd/2006-04/msg00383.html> -* [3] <http://lists.gnu.org/archive/html/l4-hurd/2006-04/msg00415.html> -* [4] <http://lists.gnu.org/archive/html/l4-hurd/2006-05/msg00012.html> -* [5] <http://lists.gnu.org/archive/html/l4-hurd/2006-04/msg00407.html> - --- [[Main/TomBachmann]] - 01 May 2006 |