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[IN CONFIDENCE RELEASE EXTERNAL]

Dear Timothy

 

Thank you for your request under the Official Information Act.  

 

We will respond within the 20-day statutory timeframe.  You can expect to
receive a response no later than 07/10/2024.

 

Your reference number is 25OIA1281.   

 

Kind regards  
Governance and Ministerial Services | Inland Revenue - Te Tari Taake

 

 

 

From: Timothy Goddard <[FOI #28336 email]>
Sent: Monday, September 9, 2024 11:13 AM
To: oia <[IRD request email]>
Subject: 25OIA1281 Request Goddard

 

External Email CAUTION: Please take CARE when opening any links or
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Dear Inland Revenue Department,

 

In a news article on Radio New Zealand today by Phil Pennington, a number
of statements from the IRD are recorded claiming that the data released is
anonymised by "hashing":

 

[1]https://aus01.safelinks.protection.outlo...

 

I would like to be able to scrunitise the claims that the processing steps
taken effectively anonymise the data released to these companies.
Accordingly, I am requesting technical documentation you hold on:

 

* The data format in which data about individuals are released to Google,
Facebook (Meta), and LinkedIn. Details of exactly how this data is
transferred are not required, just the format this data is in.

* Which personal identifiers (e.g. name, date of birth, address, IRD
number) are either directly included in those lists, or are used as input
to any hashed or encrypted field in those lists.

* The technical specifications of hashing and encryption processes
applied.

* Any internal analysis on the risk of re-identification of these hashes
(excluding legal advice subject to privilege).

 

Those are broken in to bullet points to make the scope clear, but please
don't feel they need to be answered one-by-one. A single document could
well answer multiple points.

 

Kind regards,

 

Tim Goddard

 

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References

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1. https://www.rnz.co.nz/news/business/5274...
2. mailto:[FOI #28336 email]
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