MD5

Updated 31 Jul 2026

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def
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  a widely used hashing algorithm that has been around for a long time
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weakness
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  capable of generating collisions — known since roughly the mid-1990s
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  still used casually in low-stakes contexts, but should be abandoned in favor of SHA-256 wherever security actually matters
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related
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cards
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  What's wrong with MD5, and when was it discovered?
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    It's capable of generating collisions, discovered in 1996 — shouldn't be used anywhere security actually matters

Linked references 5