sha – IT Nursery

Is it safe to ignore the possibility of SHA collisions in practice?

May 23, 2022 by IT Nursery

Let’s say we have a billion unique images, one megabyte each. We calculate the SHA-256 hash for the contents of each file. The possibility of collision depends on: the number of files the size of the single file How far can we go ignoring this possibility, assuming it is zero? 3 Answers 3

How much of a git sha is generally considered necessary to uniquely identify a change in a given codebase?

May 21, 2022 by IT Nursery

If you’re going to build, say, a directory structure where a directory is named for a commit in a Git repository, and you want it to be short enough to make your eyes not bleed, but long enough that the chance of it colliding would be negligible, how much of the SHA substring is generally … Read more