Why are 256bits "enough"?

[jlpell]

The forum link you posted is a good one. But they are talking about a SAFE network that uses 512bit hashes there, not 256bit.

One good quote from the link you have:

@Tim87

UPDATE: based on the p2/22n+1 approximate formula from stackoverflow: the global chance for a collision with p = 160 trillion messages and SHA-512 (n = 512) is around 9.5e-127. With SHA-256, it is “only” 1.1e-49 (0.00000000000000000000000000000000000000000000000011).