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a cryptographic hash function with a 128-bit (16-byte) output, now deprecated

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For MD5, no one who is both reputable and competent is using it in a context where collision-resistance is important. For SHA-1, it's being phased out; the SHA-1 break was not practical when it was … decade's time. Compatibility matters. Also, for many uses, MD5 and SHA-1 aren't cracked at all. They both have weaknesses against collision-resistance, meaning an attacker can create two messages that …
answered May 3 '15 by cpast