Yahoo Japan, the country's largest Web portal, said up to 22 million user IDs may have been leaked during a hack that was discovered last week.
The company emphasized that the IDs are already public information, and no passwords or other private data were affected. Yahoo Japan IDs are used along with password to log in to the site, and are often displayed when users leave comments or use its shopping or auction services.
The Japanese government's data protection policies have been called into question after it emerged that a decommissioned coast guard vessel was sold to a pro-North Korea organisation without any checks as to whether key data on board was first deleted.
The 106-ton Japan Coast Guard patrol boat Takachiho was taken out of service in 2011 and sold to a ship breaker run by a senior figure from the General Association of Korean Residents in Japan (Chongryon), according to the Yomiuri Shimbun.
Authorities in Japan are so worried about their inability to tackle cybercrime that they are asking the country's ISPs to block the use of Tor.
According to The Mainichi, the National Police Agency (NPA, a bit like the Japanese FBI) is going to urge ISPs to block customers if they are found to have "abused" Tor online. Since Tor anonymizes traffic, that can be read as a presumption of guilt on anyone who anonymizes their Web activity.
Malware researchers at Seculert say they've found two more cases of highly targeted malware coming out of China, and claim to have back-traced it to the same geographical region that was fingered as the source of the Project Aurora attacks.
"It's using a similar MO – infected PDFs sent out as part of a spear-phishing campaign," Aviv Raff, CTO of Seculert, told The Register. "We resolved it and found it was reporting to an IP address in China with the same physical location as the previous attacks. They are up to something."
A team of hackers led by a 16-year-old high school student is gaining attention as a favorite to win a nationwide computer hacking contest for students that started Saturday in Tokyo.
In the Security Contest Capture The Flag competition (SECCON CTF), 10 teams compete against each other to break into a server by discovering and exploiting its weaknesses.