Re: LUG: C++/C question - Tue, 06 Dec 2011 22:23:11 -0500

Subject : Re: LUG: C++/C question

From : Joe Bianco <3picide@gmail.[redacted]>

Date : Tue, 06 Dec 2011 22:23:11 -0500

I don't know exactly what you're trying to do, but since it seems like
it will always be the same values used (one solution was hard-coding
it in), could you precalculate what you need to use and just include
the relevant value(s)?

E.g. if it's an average, go ahead and calculate that average and only
include that. Surely, you can include data derived from the private
data since that doesn't give away anything by itself.

On Tue, Dec 6, 2011 at 10:12 PM, Daniel Underwood
<daniel.underwood@ncsu.[redacted]> wrote:
> The point of the program is to generate a sample of a random variable with distribution defined by the input data I'm trying to conceal from the user. �So I can't use substitute or dummy data.
>
> The program is extremely simple; the value is in the distribution derived from medical records (the private data), not in the code or algorithm.
>
> Sent from my iPhone
>
> On Dec 6, 2011, at 9:02 PM, Stephen Roller <scroller@ncsu.[redacted]> wrote:
>
>> One common way I see this handled in research is make the program load
>> the .data file in or whatever and do the process. Then distribute the
>> binary without the data. If you want to use the binary, you have to
>> ask for permission. Say for research purposes only or whatever.
>>
>> And yeah, like Kristopher says, generate some fake data or an obscured
>> subset of your data, or something.
>>
>> On Tue, Dec 6, 2011 at 7:55 PM, Kristopher Tesh <kitesh@ncsu.[redacted]> wrote:
>>> If you can remove identifying data, it may become legal to distribute. If
>>> your purpose for including the data is to demonstrate the program, it's not
>>> so hard to generate 100-odd dummy entries. Make a table of 2-5 values for
>>> each parameter and randomly assign them.
>>>
>>> On Dec 6, 2011 8:20 PM, "Daniel Underwood" <daniel.underwood@ncsu.[redacted]>
>>> wrote:
>>>>
>>>> That's a good point.
>>>>
>>>> On Tue, Dec 6, 2011, at 08:08 PM, Warren Myers wrote:
>>>>> I'd hasten to point out that if you're putting the data in the source
>>>>> file
>>>>> (in any form), it's still readable in a hex editor. In the good old days
>>>>> of
>>>>> DOS/Windows (my exposure to ASM programming), it all goes in the CODE
>>>>> segment - which means it's readable and decipherable by anyone who cares
>>>>> to
>>>>> open the file in a hex reader :)
>>>>>
>>>>> WMM
>>>>>
>>>>> On Tue, Dec 6, 2011 at 18:39, Daniel Underwood
>>>>> <daniel.underwood@ncsu.[redacted]>wrote:
>>>>>
>>>>>> Hey folks,
>>>>>>
>>>>>> Related to some research I've done, I want to make publicly available
>>>>>> a
>>>>>> program written in C++. �The problem is that the program reads input
>>>>>> data
>>>>>> from a bunch of text files, and I can't make the data publicly
>>>>>> available
>>>>>> due to contractual obligations. �I need to figure out how to rewrite
>>>>>> the
>>>>>> program so that all of the input data is compiled into the machine
>>>>>> code.
>>>>>>
>>>>>> There is a lot of data. �Below is a snippet of code to show how much
>>>>>> data
>>>>>> I'm referring to (each of the constant integers below is the size of a
>>>>>> corresponding array of doubles). �Does anyone have any suggestion as
>>>>>> to how
>>>>>> I might hide this data inside a compiled binary?
>>>>>>
>>>>>> (I suspect it's possible to use sed/awk to change the input text files
>>>>>> so
>>>>>> that they can be placed directly inside the source code files, but I'm
>>>>>> wondering if there's a better way to do this.)
>>>>>>
>>>>>> Many thanks!
>>>>>> Daniel
>>>>>>
>>>>>> [BEGIN CODE]
>>>>>> double AW3[2500];
>>>>>> double AB3[2500];
>>>>>>
>>>>>> const int NCa1p1NUM=9925;
>>>>>> const int NCa1p2NUM=832;
>>>>>> const int NCa1p3NUM=160;
>>>>>> const int NCa1p4NUM=72;
>>>>>> const int NCa1p5NUM=88;
>>>>>> const int NCa1p6NUM=28;
>>>>>> const int NCa1p7NUM=50;
>>>>>>
>>>>>> const int NCa2p1NUM=30414;
>>>>>> const int NCa2p2NUM=2673;
>>>>>> const int NCa2p3NUM=738;
>>>>>> const int NCa2p4NUM=292;
>>>>>> const int NCa2p5NUM=246;
>>>>>> const int NCa2p6NUM=56;
>>>>>> const int NCa2p7NUM=54;
>>>>>>
>>>>>> const int NCa3p1NUM=28647;
>>>>>> const int NCa3p2NUM=3299;
>>>>>> const int NCa3p3NUM=1450;
>>>>>> const int NCa3p4NUM=641;
>>>>>> const int NCa3p5NUM=570;
>>>>>> const int NCa3p6NUM=153;
>>>>>> const int NCa3p7NUM=115;
>>>>>>
>>>>>> const int NCa4p1NUM=27370;
>>>>>> const int NCa4p2NUM=3142;
>>>>>> const int NCa4p3NUM=1763;
>>>>>> const int NCa4p4NUM=1150;
>>>>>> const int NCa4p5NUM=1509;
>>>>>> const int NCa4p6NUM=478;
>>>>>> const int NCa4p7NUM=366;
>>>>>>
>>>>>> const int CAa1p1NUM=164;
>>>>>> const int CAa1p2NUM=34;
>>>>>> const int CAa1p3NUM=9;
>>>>>> const int CAa1p4NUM=2;
>>>>>> const int CAa1p5NUM=8;
>>>>>> const int CAa1p6NUM=2;
>>>>>> const int CAa1p7NUM=0;
>>>>>>
>>>>>> const int CAa2p1NUM=1077;
>>>>>> const int CAa2p2NUM=176;
>>>>>> const int CAa2p3NUM=107;
>>>>>> const int CAa2p4NUM=66;
>>>>>> const int CAa2p5NUM=57;
>>>>>> const int CAa2p6NUM=3;
>>>>>> const int CAa2p7NUM=10;
>>>>>>
>>>>>> const int CAa3p1NUM=1815;
>>>>>> const int CAa3p2NUM=223;
>>>>>> const int CAa3p3NUM=180;
>>>>>> const int CAa3p4NUM=177;
>>>>>> const int CAa3p5NUM=218;
>>>>>> const int CAa3p6NUM=42;
>>>>>> const int CAa3p7NUM=20;
>>>>>>
>>>>>> const int CAa4p1NUM=2140;
>>>>>> const int CAa4p2NUM=165;
>>>>>> const int CAa4p3NUM=144;
>>>>>> const int CAa4p4NUM=134;
>>>>>> const int CAa4p5NUM=349;
>>>>>> const int CAa4p6NUM=136;
>>>>>> const int CAa4p7NUM=126;
>>>>>> [END CODE]
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Daniel Underwood
>>>>>> North Carolina State University
>>>>>> PhD Student - Industrial Engineering
>>>>>> email: daniel.underwood@ncsu.[redacted]
>>>>>> phone: XXX.302.3291
>>>>>> fax: XXX.515.5281
>>>>>> web: http://www4.ncsu.edu/~djunderw/
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Warren Myers
>>>>> http://warrenmyers.com
>>>>> http://twitter.com/volcimaster
>>>>> http://www.linkedin.com/in/warrenmyers
>>>>>
>>>> --
>>>> Daniel Underwood
>>>> North Carolina State University
>>>> PhD Student - Industrial Engineering
>>>> email: daniel.underwood@ncsu.[redacted]
>>>> phone: XXX.302.3291
>>>> fax: XXX.515.5281
>>>> web: http://www4.ncsu.edu/~djunderw/
>>>>
>>>
>>
>

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Re: LUG: C++/C question