Sistema servidor-cliente seguro para la verificación de autenticidad de archivos por medio de algoritmos digest HASH reestadarizados

摘要

Taking into account the little certainty that we have regarding the fidelity of digital archives, a method is in order to check the available files locally with those that are contained in a source with high levels of trust and accessibility. The HASH algorithms provide a solution for such a premise, with a reduced and finite number of digits representing the files; it can be compared then that the information is true or false. Despite the great utility of the aforementioned algorithms, it is expected that the processing of information and the initial values are free access, which facilitates the intromission and possible forgery of third parties. As a way to provide a solution to the problem raised, a communication system was implemented that consists of a client with information demand capable of revealing the authenticity of the file itself and a server that attends to said request; as a basis for the above there is an encrypted communication that allows the client's request and the server's response to be highly confidential. With respect to the comparison between the information of the client and the server, it makes use of known Hash algorithms, configured in such a way that the use of the same algorithm by a third party will not generate the same summary, this allows to discriminate between own information truthful or false in a unique way.