Lifetimes of Cryptographic Hash Functions

(2007 /w updates in 2017) Past discussions:

2017 (132 points, 47 comments) https://news.ycombinator.com/item?id=13731331

2014 (54 points, 15 comments) https://news.ycombinator.com/item?id=7675415

2013 (153 points, 52 comments) https://news.ycombinator.com/item?id=6123720