Fraud Management System Part3(Fraud Detection Techniques..)

Fraud Detection Techniques:
• Velocity/Collision
• Stuffing / High Count
− IMSI - Country
− IMSI - CFDW Destination
− IMSI - IMEI
− Subscription document - IMSI
− IMEI - IMSI
• Patterns (Classic, Accumulation, Sequence)
• Unknown / Unauthorized Subscriber checks
• New Subscriber checks
• Thresholds
• Blacklists
Detection Techniques
• Cross Rate
• Credit Limit
• Split Packages
• SIM Gateway
• Prepaid
− Balance Monitor
− Odd recharges
Detection techniquesBreadth of Coverage
Types of Detection -- Technical checks
High Destination Counts
Event Pattern Detection
• Allows operator to look for specific situations
• Detect any call that matches operator-defined patterns
• Allows customer data conditions as well:
− Event is GSM CDR
− Event starts between 00:30 and 05:30, and
− Event duration > 60 minutes and,
− Event category is (International or Premium), and
− Entity activated less than 120 days ago, and
− Entity payment is cash
− Entity age is < 25
Pattern Detection (Event and Entity)
• Blacklisted fields declaration
− If dealer-Id is blacklisted then
• Regular expressions
− If dealer-id = 123.*.* then
• Approximate name matches
− If Family-Name ~ Argento then
• Applied on event fields or on entity information feed
Classic Pattern
New Pattern Model - Examples
• Accumulation Pattern in a time window:
− Pattern-1
• More than 3 recharges@5$
• within a 12 hour period
− Pattern-2
• Three calls duration > 60 min
• Days since activation < 30
• In a 6 hour period

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