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The most efficient MD5 checksum substring

If I need a shorter MD5 checksum, should I take the regular one and use the first half or the second half? Or does it even matter?

(obviously, it will cease to be MD5, it will be just a checksum)

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It doesn’t matter, but I would really think about it: you will significantly increase the probability of a collision (two different bits of data with the same checksum).

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It does not matter. Generally speaking, the entire checksum is changed for each input byte. But if you can’t decide why not xor the first half with the second ?:-)

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CNC, . , , , MD5.

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Source: https://habr.com/ru/post/1790539/

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