Biometric identifiers

Identifies documents containing references to biometric identifiers in Australian contexts. This information type is classified as personally identifiable information under applicable data protection regulations.

Type: regex
Engine: boost_regex
Confidence: medium
Confidence justification: identifier/document-structure anchored regex with constrained context replaces phrase-only detection. Added context gating and exclusion rules improve precision and reduce incidental matches.
Detection quality: Topic false positive
Jurisdictions: global
Regulations: Information Privacy Act 2009 (Qld), NDB Scheme (Cth), Privacy Act 1988 (Cth), GDPR
Frameworks: ISO 27001, ISO 27701
Data categories: government-id, pii
Scope: wide
Risk rating: 5
Platform compatibility: Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Degraded, Netskope: Unsupported

Pattern

(?is)\b(?:biometric\s+identifiers?|biometric\s+(?:data|template|record|sample|enrolment|enrollment|authentication))\b

Corroborative evidence keywords

biometric identifiers, biometric, identifiers, personal, identity, demographics, biometrics, biometric data, biometric information, biometric template, biometric identifier, data record, database record, record set, data extract, data export, database table, spreadsheet, data registry, registry entry (+15 more)

Proximity: 300 characters

Should match

biometric identifiers — Exact phrase match
biometric data — Biometric data phrase match
biometric template — Biometric template phrase match
biometric authentication — Biometric authentication phrase match
Biometric identifiers: Recorded Name: Avery Teston Date of birth: 14/02/1988 — Populated attribute field with a linked record field (85 tier)

Should not match

unrelated generic text — No biometric terminology present
identifier number 12345 — Generic identifier without biometric context
record reference A12345 — Generic anchor terms no longer match
Biometric identifiers: Name: Date of birth: — Empty form: the heading and field labels without values must not corroborate themselves (discovery only)
Policy guidance: this procedure explains how records about biometric identifiers are handled, who may access them and how long they are kept. It contains no records about any person or system. — Policy guidance naming the topic without any record (discovery only)
Biometric identifiers: Name: Avery Teston — Record with the attribute label but no value: the label must not corroborate itself (discovery only)

Known false positives

Common words and phrases related to biometric identifiers appearing in policy documents, training materials, HR templates, or compliance guidelines without actual personal data. Mitigation: Require corroborative evidence keywords within the proximity window to confirm sensitive data context rather than general discussion.
In Australian English, similar terminology used in formal or administrative contexts (education, professional documentation) that does not constitute sensitive data collection. Mitigation: Layer with additional contextual signals such as structured identifiers, form fields, or database column headers to distinguish sensitive records from general references.
High-frequency pattern matches in large document corpora due to broad regex anchors. Expected match rate is significantly higher than specific identifier patterns. Mitigation: Tune confidence thresholds for bulk scanning. Consider using this pattern primarily as a pre-filter with secondary validation.