What are some examples of hash collisions?
Hash collisions occur when two different inputs produce the same hash output. A classic example is the MD5 hash function, where different files can generate the same hash value.
Can you give me a specific example of two different files that cause a hash collision?
Sure! One famous example is the collision found by researchers in 2004, where two different PDF files were created that both produced the same MD5 hash: "d41d8cd98f00b204e9800998ecf8427e".
Why are hash collisions a problem in security?
Hash collisions can undermine the integrity of data. If an attacker can create a different file with the same hash as a legitimate file, they could potentially replace it without detection.
What hash functions are considered secure against collisions?
SHA-256 and SHA-3 are currently considered secure against collisions, as they have not been compromised like MD5 and SHA-1.
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