[rssac-caucus] Including the ASN advice in the anonymizing document

[Paul Hoffman]

Greetings again. This thread is based on a request to remove the discussion publishing ASNs with anonymized data. The text put in the document based on a request from Geoff Huston. John Bond has requested that it be removed.

The current text says:

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4 Saving Additional Information When Anonymizing

In order to help researchers looking at anonymized data, the process of anonymization can preserve some information relating to the originating Autonomous System (AS) number of the querier. A side effect of anonymization is that it destroys any possibility of establishing the origin AS of the querier. If the origin AS is sufficiently general that it does not unnecessarily expose data that should have been anonymized, it is useful to also publish the AS numbers of the anonymized addresses. This can most easily be done with a table that maps the anonymized addresses to their original AS numbers.

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Recommendation 3: Autonomous System (AS) numbers of original addresses should be made available with the anonymized data.

It should be possible for an operator to publish a machine-readable table that maps the anonymized addresses to the AS of the original data. Such a table should have a timestamp for when the mapping was made due to AS values changing over time.

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RSSAC Caucus: please weigh in.

--Paul Hoffman
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