GoogleがSHA-1ハッシュの衝突の計算に成功

Announcing the first SHA1 collision (02/23)

　https://security.googleblog.com/2017/02/announcing-first-sha1-collision.html

「will wait 90 days before releasing code that allows anyone to create a pair of PDFs」　五月が楽しみになってきました。

「Nine quintillion (9,223,372,036,854,775,808) SHA1 computations in total
6,500 years of CPU computation to complete the attack first phase
110 years of GPU computation to complete the second phase」
 

'First ever' SHA-1 hash collision calculated. 

All it took were five clever brains... and 6,610 years of processor time (02/23)

　https://www.theregister.co.uk/2017/02/23/google_first_sha1_collision/　

「$130,000 at today's cloud spot prices
　...
　ability for nation states or people who can afford」