Desarrollo de un mecanismo de cifrado basado en el algoritmo criptográfico simétrico AES.

Abstract

The present work was based on the development of the encryption mechanism based on the AES symmetric cryptographic algorithm (MECIB-AES) to compare the security that is provided with the encrypted information. The text is based on analyzing the different encrypted texts, taking into consideration, entropy, frequency analysis, autocorrelation, brute force, and traffic analysis; provide a perspective of the security level that presents this proposal compared to the one that is based. The implementation of the Mix-Shift, Mix-Key and Move-C modifications helped to perform different tests where the null hypothesis was accepted which measured the entropy, with a confidence level of 95% and an error of 5%, the analysis of frequency changes in each test performed, the autocorrelation gave rise to a greater similarity of sequences in favor of MECIB-AES, although it can be taken as a disadvantage that the values are not large, for which the algorithm was considered variable. The brute force analysis, where the time is taken into account, as well as the possible combinations of passwords, is given according to their means Xa= 4,14E+ 25 and Xm= 4,24E+25 an increase of 2, 47 % equivalent to 1,05E+24 years in favor of MECIB-AES. The analysis of the traffic made to the files resulted in lower latency and a higher transfer rate; observing a decrease of 43.19% (latency) and an increase of 31.82% (transfer rate). The results show us that this modification is acceptable and viable, therefore, it is possible to make major changes in the future.