Personal information of about 4.5 million members of the Seoul city government's public bike sharing service, named "Ttareungyi," was believed to have been leaked in 2024, according to data compiled by Yonhap News Agency on Friday.
Police recently launched an investigation into the suspected data breach after becoming aware of the existence of leaked Ttareungyi member information while conducting another investigation. They suspect hackers were behind the massive data leakage.
According to Yonhap News Agency's research, some 4.5 million of the service's 5 million members were affected by the data breach and the leaked personal information included their names, phone numbers, dates of birth and addresses.
The Seoul city government said earlier Friday that Ttareungyi members' names and resident registration numbers were not leaked because they were not required to submit the sensitive personal information when signing up for the service.
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