ETC Usage Inquiry Service: mass access from overseas IP addresses, and some accounts were logged in without authorization

1. 2023-09-30

   From this day until October 2, there was mass access to the service from overseas IP addresses, and in some of it the ID and password matched and the account was logged in. [1] [2]

2. 2023-10-04

   The six operating companies announced the case jointly. They took a measure to block access from an IP address at once if similar mass access occurs, and are notifying the customers concerned individually by email. [1] [2]

For the accounts that were logged in, the email address, registered ID, secret question and answer, and usage history may have been viewed. ETC credit card numbers and on-board unit management numbers cannot have leaked. The number of accounts concerned has not been published. [1] [2]