The personal data, including passport, driving license details, of 1.7 mn users of Japan’s most popular dating apps Omiai may have been exposed to cybercriminals in a possible hack. Net Marketing Co, the owner of the serious relationship dating app, said that it had come to know of unauthorized access between April 20-26 to the server having member information. Omiai, the Japanese word meaning matchmaking, had 6.89 mn users.