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World map of everyone here


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#1 AgeVivo

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Posted 08 August 2010 - 09:43 AM


Many persons here do not put many caracteristics about them because they want to keep some privacy, but they would very much like to know if some other persons live next to them. How to combine that?

One possibility is that everyone here sends its information to a place that collects such information in a non identyfying manner, and displays the results therefore in a non identyfying manner.
- Exemple1: list of cities where everyone lives, on a world map, with the number of persons by city
- Exemple2: year-of-birth distribution by country
- Exemple3: number of persons in each type of profession by country

I think it should be the less identyfing as possible so that everyone can answer without any reluctance *at all*, so that we will get the maximum participation as possible.
To avoid persons voting twice, or if someone wants to update its caracteristics, I see one technical way that still fully preserves privacy: one would send his email address, this can allow email confirmation (and validation if the user wishes), but the email address would NOT be preserved. Instead a HASH transformation of the email address is kept: it is an id number that statistically allows to recognize that it is the same person as before, but does not allow to find the email adress that generated this ID.

I just thought of this idea, I did not find any webservice doing it. If you know of any, please let me know. If you are interested in participating, please let me know. I think it could work for many organisations, not only imminst. And once people of the same organization find they are in the same city and want to encounter, that's another story (the system I described does not allow it as it is voluntarily non identifying) that must be organized by another system or the organization itself.

Let me know what you think of it. Thx

#2 AgeVivo

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Posted 08 August 2010 - 10:01 AM

Note: i think it is better to use the email address than the name as an ID generator, but the choice isn't obvious:


- if we use the name (name transformed in capital letters than hashed), one trouble may happen if two persons have the same name (it happens, luckily not often), and people may invent names or mispell them by error, and people might feel identified
- if we use the email, one trouble happens if the same person uses another email (it happens, very often), we need a functionality to allow people to specify they have changed emails or that they don't know which emails they have used in the past (technically I see it is actually not complex), and we can make some email validation (if the user wants) or get informations from emails (that would avoid fake imminst webpages trying to get information; but sending info by mail isn't straightforward and doesn't look un-identifying; certificates could be used otherwise)

Edited by AgeVivo, 08 August 2010 - 10:02 AM.


#3 AgeVivo

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Posted 08 August 2010 - 10:15 AM

To make it fully non identifying based on the stored data,
here are the tables:

- country / city / hash(email address+"city")

- country / region / hash(email address+"region") //if the user filled the region because he thinks its city is to small and he could be identyfied

- age / country / hash(email address+"age")
- type of profession / country / hash(email address+"profession")

- BMI / country / hash(email address+"BMI")
etc

The user specifies the information for the lines HE chooses. He does not need to give all the information.
Due to the +"city", +"age", etc, if we use a good hash system (what do you think of "md5"), no one should be able to make the link that one person living in this city has that age and that BMI, even if the data was online (well, for maximal security we should still avoid that of course)

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#4 wawee

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Posted 22 November 2010 - 04:37 AM

Hi,
That was great and thanks for the information you shared with us here....better to use the email address than the name as an ID generator.




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