Yahooがまたハックされ，非常に多数の利用者個人データが奪われたらしい

下記の記事が出ている。

　Yahoo admits it’s been hacked again, and 1 billion accounts were exposed
　ars technica: December 15, 2016
　http://arstechnica.com/security/2016/12/yahoo-reveals-1-billion-more-accounts-exposed-and-some-code-may-have-been-stolen/

　Yahoo Says 1 Billion User Accounts Were Hacked
　New York Times: December 14, 2016
　http://www.nytimes.com/2016/12/14/technology/yahoo-hack.html

　Yahoo hacked again, more than one billion accounts stolen
　ZDNet: December 14, 2016
　http://www.zdnet.com/article/yahoo-hacked-again-more-than-one-billion-accounts-stolen/

　Yahoo: One Billion More Accounts Hacked
　Krebs on Security: December 14, 2016
　https://krebsonsecurity.com/2016/12/yahoo-one-billion-more-accounts-hacked/

[追記：2016年12月16日]

関連記事を追加する。

　What can you do with a billion Yahoo passwords? Lots of bad things
　ars technica: December 16, 2016
　http://arstechnica.com/security/2016/12/what-can-you-do-with-a-billion-yahoo-passwords-lots-of-bad-things/

　In wake of billion-account hack, Verizon reportedly not so hot for Yahoo
　ars technica: December 16, 2016
　http://arstechnica.com/business/2016/12/verizon-skittish-about-acquisition-again-after-yahoo-hacked-again/

　Yahoo breach: I’ve closed my account because it used MD5 to hash my password
　Naked Security: 15 December, 2016
　https://nakedsecurity.sophos.com/2016/12/15/yahoo-breach-ive-closed-my-account-because-it-uses-md5-to-hash-my-password/

　Security! experts! slam! Yahoo! management! for! using! old! crypto!
　Register: 15 December, 2016
　http://www.theregister.co.uk/2016/12/15/yahoos_password_hash/