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NTT West group call-centre data theft

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Made public · 9,280,000 people

What leaked7

Replaceable

  • Card number

Hard to replace

  • Mobile number
  • Home or delivery address

Permanent

  • Date of birth
  • Full name
  • Gender
  • Partial date of birth or age
  • Card number81 records from two client companies
  • Date of birthin some records · NTT West's own customers
  • Mobile numberphone number · landline or mobile
  • Genderin some records
  • Partial date of birth or ageage, in some records

To-dos3 · about 30 min in all

  1. Know the scam pattern: calls and texts that cite these leaked detailsabout 5 minfreeLimits harm from: scam calls, phishing messages
  2. Turn on instant transaction alertsabout 5 minHelps you notice: scam calls
  3. Remove your address and phone from public profiles and tighten SNS privacyabout 20 minfreeLimits harm from: visits or contact at home

What happened next25 events

  1. Undetected 2 eventsabout 10 yr 0 mo · show events
  2. Response 14 eventsNotice in 211 days · show events
  3. RemedyNone on record
  4. Penalty 6 eventsOngoing · show events
  5. Disputes 3 eventsOngoing · Back to latest

Disputes: 3 events

Back to latest
  1. The former temp worker was sentenced to 3 years' imprisonment suspended for 4 years and a JPY 1,000,000 fine; he reportedly sold data to list brokers about 250 times for about JPY 25 million
  2. The former temp worker was indicted
  3. Okayama police arrested the former temp worker
Company
NTT West
When it happened
–
Company detected it
Made public
Notice
Leak confirmed
Affected
9,280,000 people · customers and residents of 69 client companies and local governments; ProCX December 19, 2023, PPC: about 9.28 million

How the facts developed

  1. Revised to 9.28 million records of 69 clients; 1.17 million could not be linked to a client and were notified by letter from February 2024
  2. About 9 million records of 59 clients announced; NTT West's own customers about 1.2 million

Sources