Sony in Japan has been a popular target of hackers for years . PlayStation network was shut down in April 2011 when hackers stole information of 77M people . Comment: Analyst says attack reveals lax cyber-security among Sony 's ranks .
Sony in Japan has been a popular target of hackers for years . PlayStation network was shut down in April 2011 when hackers stole information of 77M people . Former Sony employees are suing the company for failing to protect their privacy . Analyst says attack reveals lax cyber-security among Sony 's ranks .