Kartu Tanda Penduduk (KTP)

Detects Kartu Tanda Penduduk (KTP) patterns. This pattern is based on a Microsoft Purview built-in sensitive information type. Users already running Purview may prefer to enable the built-in SIT directly, or use this version as a starting point for customisation.

Type

regex

Engine

universal

Confidence

medium

Confidence justification

Medium confidence: pattern has structural constraints but corroborative keywords are recommended to reduce false positive rates. Added context gating and exclusion rules improve precision and reduce incidental matches.

Detection quality

Verified

Jurisdictions

id

Frameworks

ISO 27001, ISO 27701

Data categories

pii, government-id

Scope

narrow

Risk rating

7

Platform compatibility

Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible

Pattern

\b\d{16}\b

Corroborative evidence keywords

KTP, kartu tanda penduduk, NIK, identity card, ID number, identification, ID card, license, permit, registration, certificate, field, column, row, entry, record, value, form, register, database (+20 more)

Proximity: 300 characters

Should match

• 3201011234567890 — KTP from West Java province
• 3175011234567890 — KTP from DKI Jakarta
• 5101011234567890 — KTP from Bali province

Should not match

• 320101123456789 — Too few digits (15)
• 32010112345678901 — Too many digits (17)
• template example placeholder record identifier — Template/sample context should be excluded even when anchor words are present

Known false positives

• Sixteen-digit numeric sequences may match credit card numbers, long account numbers, or barcodes. Mitigation: Require corroborative evidence keywords such as "KTP", "NIK", or "kartu tanda penduduk" within the proximity window.
• In multiple languages, 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.

References

• Indonesia Identity Card (KTP) Number entity definition - Microsoft Learn