How Walmart is Combating Fraud and Saving Consumers Millions

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Hear how Walmart has used Elasticsearch to ingest more than 4 billion metadata records and use security, alerting, and Graph features to identify fraudulent gift-card requests in real time.

Technology

2
“We want to foster a culture that supports change and
helps us go along the journey we’re all on, which will
lead to even more change in the future”
- Doug McMillon
“

3
Data Science – Team Size 5
Industrial Engineer
Economist
Software/ Web Developer
Info Systems Engineer
Statistician
Feeding Machines... Feeding People...
Making Data Accessible...
Data Analytics- Team Size 30
Mathematicians
Crime Analysts
Accountants
eCommerce Analysts
Global Media Analysts
Fred Helm
- Senior Director IAI
- 20 year in state and federal law
enforcement
- Developed IROC to action
Walmart risk in real time
Tim Fenton
- 14 patents disclosed with
Walmart
- Software engineer by background
- Data Scientist for past 3 years
- Worked previously at Motorola
and in US Intel agency

Varying backgrounds lead to incredible ideas and world-class
solutions
4
Know Your
Customer
Implementati
on
Content
Strategy
Concept
& Idea
Data
Analysis
Consultation

Walmart Global Investigations
5
Corporate
Ethics
Crimes Against
the Business
Organized
Retail Crime
Consumer
Frauds
Technology
Data
Exfiltration
eCommerce
Fraud
Health &
Wellness
Theft and
Fraud related
to meds
Insurance
Fraud

6
• Proofpoint Logs/ metadata
• Email
• Chat Messages
• Contracts/ Agreements/ Statements
of Work
Communications ESI
Real-Time
• Think Teradata, Retail Link,
SAP
• Human Resources Data
• Travel & Expense
Cold Storage Databases
• System Logins
• Internet Searches
• Badge Entry/ Exit
Logs
Systems ESI
• Information provided through the
allegation
• Data available through front-end
interface
Allegation

GI Data Sciences: Skunk Works
Engines – T2
Buckeye
Landing Gear
– F5 Tiger
Tooling – C5
Galaxy
Flight
Control
System – F16
Falcon
“Have Blue”
Case Study In Re-Use:
• Lockheed “Have Blue” prototype
was about testing stealth
• Make use of off the shelf system
• In a similar vein GI DS team re-
uses Walmart IT components

Consumer Gift Card Fraud
Walmart activates billions in Gift Cards
yearly Financial processing through a 3rd party
Social engineering and gift card
activation
Customer Trust Reputation Compliance

ES Architecture for Gift Cards
Cluster
Node 1 Node 2 Node 3
Node 4 Node 5 Node 6
Node 7 Node 8
Node 10 Node 11
Node 9
Node 12
Kafka
Topic:
Point of
Sale
Kafka
Topic:
Gift Card
Balance
Checks
Spring Boot
App
Filtered Transactions:
Peak 5,000/sec
Logstash
Filtered Transactions:
Peak 50/sec
Runs in
Internal Cloud:
VM’s 110GB
RAM, 1.1TB
Disk
Adjudicate
Gift Cards
Every X
Seconds
Logstash for
archive/ML
training

Gift Card Graph
- Formed from 1
suspicious customer id
- Linked another
suspicious customer via
non-US IP
- Allowed us to action
compromised cards

Results
• Millions in customer dollars protected
• Making fraud harder to commit
• Able to automate a 24/7 protection system w/out humans in
the loop

Future
• Index all of POS
• Index Lifecycle Management

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