Sources / Press and newsletters

HHS, Guidance on de-identification

5 records were read from this source, dated 1 Jul 2022 to 15 Oct 2026.

Open it on hhs.gov

Its permanent copy in the Wayback Machine, 5 Oct 2026

Last checked 15 Oct 2026

What was read from it

Records read from this source
Record	Kind	As stated	Dated
Several kinds of evidence, never one detector	De-identification rule	Four layers: the people your exports list in their own structure (senders, authors,…	1 Jul 2022
Stand-ins from a secret key you keep, never a plain hash	De-identification rule	Each stand-in number comes from a keyed hash (HMAC-SHA-256) under a 256-bit key made on…	Sep 2023
Details that identify together are coarsened and measured	De-identification rule	In tables, postcodes are cut to their first part (US ZIP codes to three digits, or 000…	15 Oct 2026
Content is screened as well as names	De-identification rule	Records about health, children, beliefs, sex life, union membership, ethnicity, crime,…	Sep 2026
An evidence file for every release, with an expiry	De-identification rule	Each run writes a report into the copy: the engine and dictionary versions, what was…	7 Jul 2026

Several kinds of evidence, never one detector
Kind
De-identification rule
As stated
Four layers: the people your exports list in their own structure (senders, authors,…
Dated
1 Jul 2022
Stand-ins from a secret key you keep, never a plain hash
Kind
De-identification rule
As stated
Each stand-in number comes from a keyed hash (HMAC-SHA-256) under a 256-bit key made on…
Dated
Sep 2023
Details that identify together are coarsened and measured
Kind
De-identification rule
As stated
In tables, postcodes are cut to their first part (US ZIP codes to three digits, or 000…
Dated
15 Oct 2026
Content is screened as well as names
Kind
De-identification rule
As stated
Records about health, children, beliefs, sex life, union membership, ethnicity, crime,…
Dated
Sep 2026
An evidence file for every release, with an expiry
Kind
De-identification rule
As stated
Each run writes a report into the copy: the engine and dictionary versions, what was…
Dated
7 Jul 2026

Figures it feeds

HHS, Guidance on de-identification: what was read from it | AIData.Broker