Desarrollo de una aplicación de uso didáctico para comunicación segura de datos a través de la red

Abstract

The proposed security system implements the four security services: a) confidentiality, b) integrity, c) transmitter authentication and d) non-repudiation. The confidentiality service uses the symmetric DES algorithm, which, despite having the advantage of speeding up the encryption of information, the problem is the distribution of keys; therefore, the solution to this problem is asymmetric algorithms (RSA) that solve the problem of key distribution, but have the disadvantage that the encryption of information is slow. Consequently, these two types of algorithms complement each other and thus the confidentiality service is resolved. The integrity service is implemented with the MD5 summary algorithm, verifying that the hash of the message sent with the received is exactly the same, this service is also implemented through the digital signature, which also guarantees the sender authentication service, the information is encrypted with its private key, and anyone who wishes to know the identity of the issuer can do so using the public key of the same, in this way it is guaranteed that the issuer is authentic and in addition, the non-repudiation service is fulfilled, because the sender can not deny that he sent the message. The services coupled together generate a computer security system that includes the four aforementioned services for the secure sending of text messages through the network.