Comments (2)
Great. Hopefully I fixed the issue.
from crackingxoroshiro128plus.
As expected, the bug will not give the wrong answer
Prove:
Assume 2 valid xoroshiro128+ seed (x0, y0), (x0, y1), y0 != y1
(x0 + y0) mod 2^64 = output1
(x0 + y1) mod 2^64 = output1
Subtract the 2 equations, we get: (y0 - y1) mod 2^64 = 0
Since all variables are 64-bits integer, we have y0 = y1
--> remove seed (x0, y0) == remove seed (x0, ?)
--> remove seed (x0, y0) == remove seed (?, y0)
--> the bug luckily also remove (x0, ?) and (?, y0)
QED
from crackingxoroshiro128plus.
Related Issues (2)
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