Rodné číslo
Detects Rodné číslo 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
- eu, sk
- Regulations
- gdpr
- Data categories
- pii, government-id
- Scope
- narrow
- Risk rating
- 5
- Platform compatibility
- Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Compatible, Netskope: Compatible
Pattern
\b\d{6}/?\d{3,4}\bCorroborative evidence keywords
rodné číslo, birth number, personal number, ID number, identification, ID card, license, permit, registration, certificate, data record, database record, record set, data extract, data export, database table, spreadsheet, data registry, registry entry, master data (+13 more)
Proximity: 300 characters
Should match
750101/1234— Slovak birth number with slash (10 digits)880512/234— Slovak birth number with slash (9 digits)9203031234— Slovak birth number without slash
Should not match
12345/12— Too few digits after slash12345/12345— Too many digits after slashtemplate example placeholder record identifier— Template/sample context should be excluded even when anchor words are present
Known false positives
- Numeric sequences with optional slash separators may match date-based reference numbers or administrative codes. Mitigation: Require corroborative evidence keywords such as "rodné číslo" or "birth number" within the proximity window.
- In Australian tenants, Australian mobile telephone numbers can satisfy this ten-digit structure and create cross-SIT numeric identifier overmatch. Mitigation: Use the AU mobile number NONE-of regex gate where phone numbers are not valid positive evidence.
- 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.