Michal,

Redirection the discussion back to the list.

What do you mean by "we want to see them as results from borrower searches"?

What I understood is that libraries want to collect statistics on
transactions even when the patron's records have been deleted.
So:
1/ Create a patron (it's copied to borrowers and anonymized_borrowers)
2/ Do some transactions (it's in statistics and anonymized_transactions)
3/ Update a patron (it's updated in borrowers and
anonymized_borrowers, if option 1 is picked)
4/ Delete the patron (moved from borrowers to deletedborrowers)
6/ Clean/purge the deletedborrowers
=> anonymized_* tables are still there, statistics still possible

7/ When needed, given parameters, anonymized_* entries will be deleted.

Le ven. 22 nov. 2019 à 15:51, Mike D. <[email protected]> a écrit :
>
> Hello,
> I think that thinks are maybe less complicated. I really like Your idea with 
> hash. But if we anonymize  (replace by some generated hash or something 
> similar) name, adress, telephone, e-mai and adress, noticess, we don't need 
> related information about borrowers. Because we cut the rope between data and 
> person. Anonymized borrower records we can set as "anonymized" and store them 
> separately from "live" borrowers, because we want to see them as results from 
> borrower searches. What do You think about this?
>
> Michal
>
> pá 22. 11. 2019 v 15:41 odesílatel Jonathan Druart 
> <[email protected]> napsal:
>>
>> 2 tables vs 1 table :)
>>
>> Le ven. 22 nov. 2019 à 15:28, Mike D. <[email protected]> a écrit :
>> >
>> > Hello Jonathan,
>> > what options? I miss a point :-)
>> >
>> > Michal
>> >
>> > pá 22. 11. 2019 v 15:17 odesílatel Jonathan Druart 
>> > <[email protected]> napsal:
>> >>
>> >> Thanks for the help Michal,
>> >> What about the two options I have?
>> >>
>> >> Le jeu. 21 nov. 2019 à 17:58, Mike D. <[email protected]> a écrit :
>> >> >
>> >> > Hi Jonathan,
>> >> > I’m volunteer for debate about processes and anon tools and methods. 
>> >> > I’m ready to be tester of bugs. Koha is GDPR ready but some points 
>> >> > could be improved for easier everyday usage in libraries. Because if 
>> >> > something is clear and easy everybody do it without fear and stress.
>> >> >
>> >> > Thank You
>> >> >
>> >> > Michal
>> >> >
>> >> > čt 21. 11. 2019 v 17:14 odesílatel Jonathan Druart 
>> >> > <[email protected]> napsal:
>> >> >>
>> >> >> Hello everybody,
>> >> >>
>> >> >> I have been contracted by KohaLa to work on some GDPR requirements.
>> >> >> The main idea is to "anonymize" patron's data but letting the library
>> >> >> access the transactions' statistics.
>> >> >>
>> >> >> I am going to present you what I am planning to implement, in order to
>> >> >> collect ideas and answers.
>> >> >>
>> >> >> There are the following steps I have in mind:
>> >> >> 1. Pseudonymization [1] of patron's data
>> >> >> 2. Improve deletion of patron related date (tables statistics,
>> >> >> old_reserves, deletedborrowers)
>> >> >> 3. Add the ability to remove data that have been pseudonymized
>> >> >>
>> >> >> I see 2 ways to achieve point 1:
>> >> >> * We create 2 tables, 1 for the patrons, 1 for the transactions.
>> >> >> - borrowers_anonymized will contain: hash_id, has_cardnumber,
>> >> >> branchcode, creation_date, categorycode, bsort1, bsort2,
>> >> >> [borrower_attributes]
>> >> >> - transaction_anonymized will contain: hash_id, transaction_type,
>> >> >> branchcode, itemnumber, holdingbranch, location, itemcallnumber,
>> >> >> itemtype, timestamp
>> >> >>
>> >> >> hash_id will be generated using the borrowernumber and a key (that
>> >> >> will be stored on the server, path in koha-conf)
>> >> >>
>> >> >> Pros: Easier to understand and manipulate as it follows existing 
>> >> >> structure.
>> >> >> We track patron's modifications (this is the most important part)
>> >> >> Cons: tech part: new config, a new path have to be created (minor)
>> >> >>
>> >> >> * We create only 1 table, (nosql-like). It will contain the same data
>> >> >> as previously, without the hash_id
>> >> >>
>> >> >> Pros: No new config. Data are never updated and we have the values
>> >> >> when the transactions has been processed.
>> >> >> Cons: Data are not updated :)
>> >> >>
>> >> >> About borrower_attributes, the initial specification asks for 2
>> >> >> attributes defined in a syspref. I think it should be configurable,
>> >> >> with a join table (Pro: more flexible, Con: SQL requests more complex)
>> >> >>
>> >> >> I think we should have the 2 tables and keep a link between the
>> >> >> anonymized_patrons and anonymized_transactions tables.
>> >> >>
>> >> >> What do you think?
>> >> >> I am going to start the implementation very soon in order to plan an
>> >> >> integration early in the 20.05 dev cycle.
>> >> >>
>> >> >> Regards,
>> >> >> Jonathan
>> >> >>
>> >> >> [1] https://en.wikipedia.org/wiki/Pseudonymization
>> >> >> _______________________________________________
>> >> >> Koha mailing list  http://koha-community.org
>> >> >> [email protected]
>> >> >> https://lists.katipo.co.nz/mailman/listinfo/koha
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