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Subject: raw notes from f2f day 1: 8:30-11:00 AM
6/28:
xacml f2f day one:
wireless logon:
guest
zxmJPy98 (good today only)
doron can't make it;
david chadwick is tied up at airport, will miss AM today
attendees:
hal
rich levinson
erik
andy
greg nevin
jan herrmann
david choy
david button
john tolbert
phone:
paul tyson
Erik: submitted wd-21 going thru chgs
p 45 sec 5.1 combining parameters
5.14 combining params policy
7.12 alg applies to rules not target
7.13 same as above
7.19.3 remove word and
p 105
p 119 quotes on type
p 120 deleted a plural 's'
p 121 added quotes around true
p 122 added u to urn
p 127 heading chg
p 128 2 attr ids w new ones
p 129 attr cats; multiple times
p 130 3.0 datatype
p 134 C.1 clarified text
p 134 Node children, evaluate also obl, adv not determ
paul: caught p-code bug length of; erik fixed as we go
in 4 places, in wd-22
p 136 word 'any'
p 142 dup 's' removed
jan: issue: string not equals has usability issues
hal: easy to find things that match, not so easy to
find things that don't match, w hash index
erik: it's a trap to use ne in targets; only works
under specific situations; need one and only
jan: svc a,b,c,d,e in root policy say svc ne a, guarantee
that descendant policy wont be finding it;
erik: could access by other means, like host names;
jan: if user has mult roles, then role ne;
erik: if want to exclude role, stuff and foo will
not work w target; stuff str ne true will match;
erik: can't have conditions in policy,policyset
paul: allof, anyof
erik: only soln is to add condition to policy,policyset
user can't find do for which he is the author
paul: adding not element makes it indexable; blurs
target and condition;
hal: original motive not incl condition was to avoid
processing overhead
paul: why have targets
erik: indexing policies
erik: would prefer cond to more powerful target
erik: target has builtin anyof
paul: reevaluate scope of variable defns
erik: obl at policyset level, can't have variable
defns at policyset level;
erik: versioning policies leads to difficulties; redundant
with repository stores; easier to do refs w/o the version
in xacml
erik: usability issues for policy references; doesn't say
you have to pick latest.
hal: every policy, policyset must have unique identifier;
only place we make use is policyset refs;
erik: sec 5.10 end; version matchiing
do we need a target if we have condition;
jan: why does ver play role in poliicy eval?
erik: ex enterprise container that might be versioned;
hal: not fundamentally different;
hal: federation of policy admin; having them come together
at policy dist time;
jan: can put select query to evaluate policy;
erik: select ref in policy creates tight integration
betwen policy and storage mechanism;
hal: func behavior specifiable; does not want storage
to impact;
erik: nothing said about id: how to find policy?
paul: seems to tie into friendly pollcyids
hal: general rules against deleting, but that has issues
hal: general discussion on futures; paul was web friendly
policyids your issue?
paul: issue is composition of policy sets w versioning
need some kind of defn to resolve multiple refs.
if you don't know where to start, you are lost;
erik: even when xml catalog; can define what find is.
always retrieving policy ref from web is too specific
paul: how to manage federated policies; need to
erik: file protocol;
david: where policies ref'd from undefined; have to
talk to somebody at runtime to get initial ref;
jan: sql ref to db; different ways to ref policy
john: need a minimum spec; can't leave to vendors
paul: no company owns export laws
hal: orgs have tax rule impls
expects policy acquisition not to be general
runtime feature; only do stuff on fly that specifi
request
hal: cohort: policies that are enforced at same time;
david choy: use cases: building large scale component
systems; policies won't look like xacml; at some point
policies need to be
hal: admin fcn: creates policies; puts them in some
kind of master repository;
out in the world are pdps;
one func is to group policy and policysets;
2nd is to group cohorts;
need some kind of decision alg in pap to decide where
the policies go, i.e. to which pdp;
andy: is this preeval of some policies?
hal: basically, yes;
hal: people said what are specific policies?
david: for example all policies that apply to
specific appl that you send to mgr of that appl
hal: cohorts are also like a policyset;
jan: things you can put in policy reference dictate
what mechanisms; file system, sql, xpointer, url;
hal: there are some defns on wiki about policy distr;
rich: there are several dimensions to the problem
hal: issue of policy references (version was too much);
jan: issue is that there is no defined mechanism
for defining references;
greg: stdize policy refs: get policyIdReference
in policy query; in resp get back policyset.
looking at saml prof of xacml;
hal: issue 62 on:
http://wiki.oasis-open.org/xacml/IssuesList
has defn of "cohort" as group of related policies
david: from deploy perspective: need all the pieces
if admin to support policy model directly, then
is suitable for human user to administrate; if look
at xacml model; highly expressive; question is if
suitable for human to administrator;
talking about the model, not the gui.
hal: it will evolve starting from assembler to java
metaphorically;
assumptions: policies built from tools
erik: there are xacml characteristics like combining
algorithm that are direct concepts in xacml; not the
xml concepts;
david: looking of examples of people putting this
to use;
looking for more than authoring; it is dealing w
security challenge and how to manage policies out
there;
ex. somebody created whole bunch of policies in db;
want to change authority on certain resources: which
policies do I update? do I create new ones?
until this is defined, don't know how to do this.
erik: day to day chgs happen to attrs; but not
workflow or "official" policies;
john: obj security; have seen demos where can take
english lang stuff that puts out xacml;
rich: policy dialects or design paradigms
john: wanted to invite; andrea westerinen has done
policy analysis; also lang from obj security
they have different approaches to same problems
the more we know;
hal/erik: agenda: let's drop json since david b not here;
erik: logistics for social - anne may be interested
hal: legal seafood;
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