Implementação e análise do algoritmo de cifra simétrica TEA

• Autor(a) principal: Silva, Bruno Henrique de Aguiar
• Data de Publicação: 2020
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/214101
• topic: Algoritmos; Criptografia; Simulação (Computadores); Telecomunicações

The transmission of confidential data through a channel requires a scenario highly restricted to security, therefore requiring the application of some encryption algorithm. Encryption is a technique used to protect data from malicious attacks. There are different algorithms used in cryptography, chosen depending on the desired application. In this work we are interested in the algorithms TEA (Tiny Encryption Algorithm) and DES (Data Encryption Standart), both algorithms are of symmetric key and block cipher and, based on Feistel networks. The TEA has a very simple description and implementation and is efficient for medium security systems. In addition, TEA achieves complete diffusion and confusion after just six rounds. DES, despite being currently considered insecure for several applications, is a well-known and used encryption algorithm. In this work we present a study on the functioning of the TEA, an implementation of this algorithm using the MATLAB software and an analysis in relation to diffusion, confusion and avalanche effect for 5, 32 and 50 rounds. We also present a study and an implementation of the DES encryption algorithm.