About Lesson
Hash Collisions and Their Implications
A hash collision occurs when two different inputs produce the same hash value. Collisions can compromise the security of hash functions, making them unsuitable for cryptographic purposes. Some key points about collisions include:
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Birthday Attack:
- A cryptographic attack that leverages the birthday paradox to find two inputs that produce the same hash value. This attack demonstrates why a secure hash function requires high collision resistance.
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Impact on Security:
- Collisions can undermine digital signatures, certificate authorities, and other security systems that rely on hash functions.
Modern hash functions like SHA-2 and SHA-3 are designed to minimize collision risks.