Criptografia: aspectos teóricos e proposta de autenticação utilizando dados cadastrais do usuário

Abstract

Presents its main concepts, techniques, algorithms and its importance in a digital world where increasingly valuable informations travel over the internet are subject to interception by malicious users ready to get advantages (mainly financial). Advantages and disadvantages of each cryptographic technique will be presented and situations where each of them is indicated. At eh end of study will be presented an authentication proposal based on asymmetric cryptography algorithm RSA. Authentication will use as criteria for generating cryptographic keys social user informations (such as name of father or mother, cpf or id numbers, date of birth) registered in a database of a enterprise. This proposal aims to generate a different cryptographic result for the user's password on each login. So if this connection is being intercepted constantly, it will be simulated a different password each time (OTP - One-time password), increasing the difficult of password discoveryby potential attackers.