From elio.spinello@csun.edu Sun Apr 18 07:40:32 1999
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Reply-To: "Elio Spinello" <elio.spinello@csun.edu>
From: "Elio Spinello" <elio.spinello@csun.edu>
To: <waphgis@u.washington.edu>
Subject: Re: WAPHGIS:  moving data around and confidentiality
Date: Sun, 18 Apr 1999 07:45:12 -0700
Message-ID: <01be89aa$101f87a0$242bb3d1@marie>
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In cases where perfect street level accuracy is not required, we =
randomly disperse each point about 1/4 mile and then label the maps =
accordingly.  As far as transporting is concerned, everything gets =
encrypted and individual level records are segmented and sent separately =
(personal identifiers in one file and information about them in =
another).  It's not a perfect technique but the average person stumbling =
onto the them would not find much that was usable.

++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=
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+
Elio Spinello
Department of Health Sciences
California State University, Northridge
18111 Nordhoff St.
Northridge, CA 91330-8285

Voice: 818-831-7607  Fax: 831-9078
elio.spinello@csun.edu
Home Page: http://www.csun.edu/~hchsc018
=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=
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=3D=3D=3D=20
We have had a bit of discussion on GIS & privacy issues and I would like =
to inquire about something a little bit larger in scope. What polices to =
you have in place concerning transferring public health data from here =
to there, like in my case from the WA State DOH to the U of WA? A =
standard encryption scheme, no it's not done, OK but never with any =
identifiers, just what? One can imagine someone intercepting a shp file =
with the STD cases in some county and then loading that into ArcView and =
zooming right to street level and of course viewing any attribute data. =
Of course the danger is far wider than GIS coverages.=20
   =20
    And if you have policies, can you describe the process you used to =
develop them?  Mostly a political decision, common sense, an objective =
analysis with some risk calculations?=20
   =20
    Thanks
   =20
    Richard E. Hoskins=20
    GIS & Spatial Epidemiology Group
    WA State Dept. of Health
    1102 Quince Street
    Olympia, WA 98504-7812
    Tel: (360) 236-4270
    reh0303@doh.wa.gov

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<DIV><FONT color=3D#000000 size=3D2>In cases where perfect street level =
accuracy is=20
not required, we randomly disperse each point about 1/4 mile and then =
label the=20
maps accordingly.&nbsp; As far as transporting is concerned, everything =
gets=20
encrypted and individual level records are segmented and sent separately =

(personal identifiers in one file and information about them in =
another).&nbsp;=20
It's not a perfect technique but the average person stumbling onto the =
them=20
would not find much that was usable.</FONT></DIV>
<DIV><FONT color=3D#000000 size=3D2></FONT>&nbsp;</DIV>
<DIV><FONT size=3D2>
<DIV>++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=
=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=
=3D++++<BR>Elio=20
Spinello&nbsp;</DIV>
<DIV>Department of Health Sciences<BR>California State University,=20
Northridge<BR>18111 Nordhoff St.<BR>Northridge, CA =
91330-8285<BR><BR>Voice:=20
818-831-7607&nbsp; Fax: 831-9078<BR><A=20
href=3D"mailto:elio.spinello@csun.edu">elio.spinello@csun.edu</A><BR>Home=
 Page: <A=20
href=3D"http://www.csun.edu/~hchsc018">http://www.csun.edu/~hchsc018</A><=
BR>=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=
=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D++++=3D=3D=3D=3D+++=
+=3D=3D=3D=3D&nbsp;&nbsp;</DIV></FONT></DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: #000000 solid 2px; MARGIN-LEFT: 5px; PADDING-LEFT: =
5px">
    <DIV><FONT face=3DArial size=3D2>We have had a bit of discussion on =
GIS &amp;=20
    privacy issues and I would like to inquire about something a little =
bit=20
    larger in scope. What polices to you have in place concerning =
transferring=20
    public health data from here to there, like in my case from the WA =
State DOH=20
    to the U of WA? A standard encryption scheme, no it's not done, OK =
but never=20
    with any identifiers, just what? One can imagine someone =
intercepting a shp=20
    file with the STD cases in some county and then loading that into =
ArcView=20
    and zooming right to street level and of course viewing any =
attribute data.=20
    Of course the danger is far wider than GIS coverages. </FONT></DIV>
    <DIV>&nbsp;</DIV>
    <DIV><FONT face=3DArial size=3D2>And if you have policies, can you =
describe the=20
    process you used to develop them?&nbsp; Mostly a political decision, =
common=20
    sense, an objective analysis with some risk calculations? =
</FONT></DIV>
    <DIV>&nbsp;</DIV>
    <DIV><FONT face=3DArial size=3D2>Thanks</FONT></DIV>
    <DIV>&nbsp;</DIV>
    <DIV><FONT face=3DArial size=3D2>Richard E. Hoskins <BR>GIS &amp; =
Spatial=20
    Epidemiology Group<BR>WA State Dept. of Health<BR>1102 Quince=20
    Street<BR>Olympia, WA 98504-7812<BR>Tel: (360) 236-4270<BR><A=20
    =
href=3D"mailto:reh0303@doh.wa.gov">reh0303@doh.wa.gov</A></FONT></DIV></B=
LOCKQUOTE></BODY></HTML>

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