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Calling Card Calls

Calling Card Calls. CALLED PARTY. CALLING PARTY. 5E SWITCH. Call detail: time of day, duration, origin, destination, charged number, …. BILL SYSTEM Billdats RAMP. CALL DETAIL DATA WAREHOUSE SCAMP. CARD DATABASE CPP. Scampweb. GFMS. FRAUD & USAGE MONITORING GROUPS.

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Calling Card Calls

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  1. Calling Card Calls CALLED PARTY CALLING PARTY 5E SWITCH Call detail: time of day, duration, origin, destination, charged number, … BILL SYSTEM Billdats RAMP CALL DETAIL DATA WAREHOUSE SCAMP CARD DATABASE CPP Scampweb GFMS FRAUD & USAGE MONITORING GROUPS AT&T SHANNON R&T LABS

  2. Calling Card Calls FRAUD & USAGE MONITORING GROUPS

  3. Calling Card Calls AT&T SHANNON R&T LABS Colin Goodall Sylvia Halasz Hyunsook Lee Krishnan Eswaran Data mining of call detail Daily query and signature updating Fraud and usage alerts into GFMS Gersony Hildebrand(Sandy Hall) John Mocenigo: GFMS Daryl Pregibon(Calderbank):Signatures Rick Greer: Daytona Anne Rogers(Belanger): Hancock

  4. Number of cards used/day Number of card sig alerts generated/day Number of alerts worked/day % of worked cards taken down/day 900,000 300 50-70 14-26% Analogy distance of Sun from Earth less than once around the Equator Actual results so far Financial results Amount of uncollectibles on calling cards decreased by ~ $300,000/month (~ 30%)

  5. ------- alarms and PFG alerts for AT&T cards 891253 ------- 109 Card Sig alarms: 6 PFG 137 alarms: cardsig - highest confidence 27 PFG 136 alarms: cardsig - survival model-based 76 PFG 135 alarms: cardsig - high probability ratio # card signature alerts with the highest confidence of fraud # for the period 2001-06-10@00:00:00. to 2001-06-11@00:00:00. # there are 6 card numbers listed 89125394148596539|98 89125392099385357|97 89125333076252335|96 89125321241496143|91 89125320176821960|89 89125333539738110|87

  6. ------- alarms and PFG alerts for AT&T cards 891288 ------- 85 Card Sig alarms: 6 PFG 137 alarms: cardsig - highest confidence 25 PFG 136 alarms: cardsig - survival model-based 54 PFG 135 alarms: cardsig - high probability ratio # card signature alerts with the highest confidence of fraud # for the period 2001-06-10@00:00:00. to 2001-06-11@00:00:00. # there are 6 card numbers listed 8912889723422305|96 8912886916966205|89 8912884740803348|89 8912886650531900|89 8912887889508404|89 8912882692303903|87

  7. ------- alarms and PFG alerts for AT&T cards other than 891253 and 891288 ------- 81 Card Sig alarms: 1 PFG 137 alarms: cardsig - highest confidence 7 PFG 136 alarms: cardsig - survival model-based 73 PFG 135 alarms: cardsig - high probability ratio # card signature alerts with the highest confidence of fraud # for the period 2001-06-10@00:00:00. to 2001-06-11@00:00:00. # there are 1 card numbers listed 9370360670|86 ------- alarms and PFG alerts for non-AT&T cards (LEC, Commercial) ------- 9 Card Sig alarms: 3 PFG 136 alarms: cardsig - survival model-based 6 PFG 135 alarms: cardsig - high probability ratio # card signature alerts with the highest confidence of fraud # for the period 2001-06-10@00:00:00. to 2001-06-11@00:00:00. # there are 0 card numbers listed

  8. CARD USAGE db and Alerts 180 days x 10 summary statistics/card calls/secs/rate/zeros attemps x domestic/international Dollar based thresholding for day,week, month, quater Card specific threshold Bus/Res, ULI, usage and payment history Daytona/Hancock/QuickBin time & memory, data structures & locality

  9. Canonical Card No. & CARDINFO db 17 10 (TLN) 16 7,8,9 (Time Choice) Card aliases • RAMP CPP/LSA/CSMS connectivity BusRes discernment BTN/PAccount card no.’s • Parallel screenscrape 180k lookups/hour

  10. Subscription Fraud • Known fraudsters, training data for multiple signatures • Enterprise Miner • Cluster Analysis • Discriminant Analysis • Association Rules • Decision Trees • Modeling • Threshold on card distribution quantiles • Multiple fraud distributions • Signature enhancement • More components • Multiple distributions/card

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