So what’s a good hash function? • Heuristic, good when keys are uniformly distributed! • Idea! Don’t use a fixed hash function! …

Perfect Hashing (for static case) We say a hash function is perfect for S if all lookups involve O(1) work.

A cryptographic hash function has the same properties as ordinary hash functions: it is easy to compute, takes an arbitrarily long …

Designing hash functions is beyond the scope of CS106B! But in the second half of this lecture, we’ll discuss how to use them.

Hash functions like MD5, SHA1, SHA256, SHA512, SHA3, ... are amongst the most widely-used cryptographic primitives. Their …

Hash functions play a fundamental role in cryptography They are used in a variety of cryptographic primitives and protocols. They …

Hashing is one-way. There is no “uh-hashing”! System does not store actual passwords! Cannot go from hash to password! Why is …