  Randomness plays a key role in the design of attacks on cryptographic systems
and cyber security algorithms in general. Random walks and quantum walks are
powerful tools for mastering random phenomena. In this article, I propose a
probabilistic attack model of a cryptographic system. This model is based on a
random or quantum walk with the space of states being a space containing the
secret to be revealed. This space can be a subspace of keys, plain texts or
cipher texts.
