How long would it take you to find a collision in SHA1 with $10,000 to spend on equipment and electricity? Reading the intro to [1] specifically the 4th paragr

How long would it take you to find a collision in SHA1 with $10,000 to spend on equipment and electricity? Reading the intro to [1] specifically the 4th paragraph, would suggest that sometime in the next fifteen years, a breakthrough for finding a collision should probably be developed, and if you wait for when that happens, say, 14 years from now, then $10,000 should still buy you enough computing power to do it within a year, at the computing prices that exist then. Computing power increases much faster than inflation. So the answer is "15 years, 14 years of waiting and then 1 year of computing. +/- 30 years and 70 years, respectively." in other words: it's just pure speculation. not a real answer. a real answer is "we don't know, but with current computers and current algorithms, > 100 years, it just can't be done with $10k in equipment. however this is likely to decrease soon." you're basically adding the same caveat to life expectancy. [1] https://en.wikipedia.org/wiki/SHA-1 https://en.wikipedia.org/wiki/SHA-1