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Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteMastercard says a generative-AI system can identify potentially compromised payment cards sooner—before criminals try to use them. It connects partial stolen-card details with transaction and merchant patterns, predicts which full card numbers may be exposed, and alerts the banks that issued them. The bank, not the AI system alone, can then decide whether to block and replace a card.
How can Mastercard detect a card before a criminal uses it?
Criminals may post fragments of stolen card data on illegal websites after obtaining it through methods such as malware, spyware or card skimming. Mastercard says it receives relevant threat information through partners and third parties; it does not say that it directly scans illegal websites.
Its system combines generative AI, graph technology and Mastercard network transaction data. Graph technology helps connect relationships among card accounts, merchants and transaction behavior. The AI uses those patterns alongside partial stolen-card details to infer which complete card numbers may be compromised and estimate the likelihood that criminals will use them.
The system can also work in the other direction: clusters of cards that appear compromised may help identify merchants potentially connected to a breach. That is a risk signal, not by itself proof that a particular merchant caused a breach.
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What happens after the system flags a card?
- Identify a pattern. Mastercard’s system processes threat information and network relationships that may point to compromised-card activity.
- Predict likely exposed cards. It matches partial information and risk patterns to cards and estimates the likelihood of criminal use.
- Alert the issuing bank. The bank receives information about cards considered potentially compromised.
- Decide whether to block and replace. The issuing institution can block a suspect card and issue a replacement. Mastercard’s announcement does not promise that every alert automatically results in replacement.
- Monitor attempted transactions. Mastercard says transaction attempts can continue to be monitored for additional fraud.
For a cardholder, the intended benefit is that a bank may replace a card before a fraudulent purchase appears on an account. Detection and response happen within Mastercard’s network and participating financial institutions, rather than through a consumer-facing AI tool.
How does this differ from ordinary fraud monitoring?
| Aspect | Compromised-card detection described by Mastercard | Post-transaction fraud monitoring |
|---|---|---|
| Timing | Looks for signs of exposure before a criminal transaction is detected. | Responds to suspicious or fraudulent activity after a transaction is attempted or made. |
| Data | Uses links among partial threat data, cards, merchants and network transaction patterns. | May rely on activity visible to an individual issuer; the figures Mastercard published do not establish one common data scope across banks. |
| Response | Can alert an issuer so it may block and reissue a card proactively. | Typically prompts investigation or action in response to a suspicious transaction or reported loss. |
| Certainty | Produces probabilistic predictions and vendor-reported performance figures. | Also involves issuer-specific detection and decisions; comparative independent results are not stated. |
What performance figures has Mastercard reported?
In its May 22, 2024 announcement, Mastercard said the generative-AI enhancement doubled the speed at which it could detect potentially compromised cards. The same release reported up to a 200% reduction in false positives and identification of merchants at risk from or compromised by fraudsters 300% faster. These are Mastercard’s claims, not independently validated test results; the release does not establish that every issuer or cardholder will see those outcomes.
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Mastercard also described figures for Decision Intelligence Pro, its broader real-time transaction risk-scoring service: it said the service scans one trillion data points, enhances a risk score in less than 50 milliseconds, and builds on an existing Decision Intelligence service that scores 143 billion transactions annually. Those figures describe the wider transaction-scoring product, not a guarantee that each compromised card will be found within a particular time.
Does this mean Mastercard will replace your card before fraud?
No. The system is designed to help identify likely compromise earlier, but Mastercard describes predictions and alerts—not universal detection or a guarantee that fraud will be prevented. Results depend on the information available to the system and the response of the card issuer. Banks retain the operational role of deciding whether to block a card and issue a replacement.
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Mastercard executive vice president of security and cyber innovation Johan Gerber described the aim as identifying where credentials may have been compromised and remedying the situation for affected customers and others who may not yet know they are exposed. The practical takeaway is that this is an additional network-level way to surface risk, not a substitute for monitoring your account or contacting your issuer if you spot an unfamiliar transaction.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Sources and scope
Mastercard announced the capability on May 22, 2024, describing its use of generative AI to detect potentially compromised cards. The Associated Press reported on the announcement on May 21, 2024, and quoted Gerber on the intended response. The performance figures above are attributed to Mastercard’s 2024 statements; no independent test results are established here.
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