Card Transactions Stream

Real-time stream of card authorisations, enriched for fraud models.

Strictly ConfidentialFinancial crimeBanking secrecyCustomer PIIFinancial Crime · Pub/Sub stream + BigQuery · ~410K events/day · 1.1 TB (13 months)

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About this dataset

Authorisation-level stream of every debit and credit card transaction from the card switch, enriched with merchant category, channel, device and geolocation features. Feeds real-time card fraud scoring with sub-second latency and is landed to BigQuery for model training and investigation. Card numbers are never present; cards are referenced by a token.

Usage rights

Group Financial Crime Compliance and Group Data & AI for fraud detection, model training and investigation only. Customer-level data under banking secrecy (FSA 2013) and PDPA 2010. Stays in-region in Google Cloud Malaysia; export outside the region, re-identification attempts and joins to raw identifiers are prohibited. Direct identifiers are tokenised at ingestion; the token vault is held by Group Data & AI and is not exposed to consumers. PCI DSS scope: PANs are tokenised at the switch and never enter the lakehouse.

Lineage

Card switch authorisation messages are published to Pub/Sub, enriched in a Dataflow job (merchant reference data, device fingerprint, velocity counters) and streamed to a partitioned BigQuery table. Dataplex monitors late-arrival rates, schema drift and null rates on enrichment fields every hour.

#cards#fraud#streaming#pub-sub#real-time#tokenised

Ownership and sensitivity

Owned by

Group Financial Crime Compliance Fraud Risk Management

Accountable owner: Chloe Tan

Who approves access

Owner, Fraud Risk Management, Chloe Tan
Data Governance Office, Ahmad Faizal

In Fight financial crime

Strictly Confidential

Customer-level data under banking secrecy and PDPA, and models that decide on customers.

Named-user entitlement with the data owner's consent and a stated purpose; reviewed on expiry.

Financial crime: Used in AML, fraud or sanctions controls; tipping-off restrictions apply.
Banking secrecy: Customer account information protected under the Financial Services Act 2013.
Customer PII: Contains or processes personal data about customers (PDPA 2010).

1 model trained on this dataset

Card Fraud Detector

Anomaly Detection · 1.8M calls/30d

Details

Updated: 2026-08-03
Cadence: Real-time
Format: Pub/Sub stream + BigQuery
Licence: BU Restricted
Latest version: 3.2