Knapsack-Problem

The so-called knapsack problem was one of the first problems used for public key methods. The description is simple: Given a backpack that can carry a certain weight and a large number of objects with different masses. The problem is to choose what to put in the backpack to fill it optimally. For a large number of objects, this is really a hard problem; however, the algorithms based on it have now all been shown to be unsafe.