2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/134049Lectures on classical and quantum cryptography. Contents: Private key cryptosystems. Elements of number theory. Public key cryptography and RSA cryptosystem. Shannon`s entropy and mutual information. Entropic uncertainty relations. The no cloning theorem. The BB84 quantum cryptographic protocol. Security proofs. Bell`s theorem. The EPRBE quantum cryptographic protocol.27 pagesQuantum PhysicsMesoscale and Nanoscale PhysicsInformation TheoryHigh Energy Physics - TheoryMathematical Physicstext