Halves the key space of AES
Measurement happens after you spread out all possibilities, let the incorrect answers interfere with each other and cancel out, and then amplify the correct answer before measuring to extract it.
A quantum algorithm that uses geometric and quantum properties to solve search problems—whose classical implementations take exponential time—in polynomial time.
For unstructured search problems, it queries a function (an oracle/“black box”) with candidate inputs to produce a high probability of the correct solution.
An Unstructured search algorithm devised by Indian computer scientist Lov Grover.

Seonglae Cho