Speaker
Description
The security of classical cryptosystems is based on the assumption about the impossibility of solving certain mathematical problems, like the factorization of large numbers. Unfortunately the advent of quantum computers represents a serious problematic owing their exponentially higher computational power; this problem is known as “quantum threat”. However quantum mechanics can be as well exploited to build new cryptographic protocol like in the case of Quantum Key Distribution (QKD). QKD can be considered the quantum answer to the quantum threat, being its security based on the properties of quantum systems and thus no more depending on the technological advancement. A particular QKD protocol known as BB84 will be described and the tools needed to study its security will be introduced.
