http://japan.zdnet.com/security/sp_cloudsecurity2011/35001689/

http://internet.watch.impress.co.jp/docs/news/20110414_439591.html

http://jp.techcrunch.com/archives/20110413let-me-goo-gl-these-new-features-for-you/

http://monoist.atmarkit.co.jp/mn/articles/1104/14/news001.html

http://internet.watch.impress.co.jp/docs/news/20110414_439679.html

http://internet.watch.impress.co.jp/docs/news/20110414_439668.html

http://ascii.jp/elem/000/000/599/599990/

http://www.ieee-security.org/TC/SP2011/index.html