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ine5429-p1

Seguranca em Computadores - Prova 1

QuestionAnswer
O que e cifragem simetrica? Uso da mesma chave para cifragem e decifragem
O que e criptografia? Estudo de esquemas de cifragem e decifragem
O que e criptoanalise? Estudo de tecnicas de decifragem sem conhecer a chave secreta
Como funciona a cifragem de Cesar? Troca as letras do texto claro por 'i' letras a frente
Como funciona a cifragem mono-alfabetica? Mapeia um alfabeto para outro
Como funciona a cifragem playfair? Usa uma matriz 5x5 para cifrar pares de letras
Como funciona a cifragem de Vigenere? Conjunto de substituicoes mono alfabeticas que com base em texto claro e chave
Como funciona a cifragem de Vernam? Transforma texto e chave em bits e faz ou-exclusivo bit a bit
Como funciona a cifragem One-Time Pad? Baseada em Vernam(transforma texto claro e chaves em bits e faz ou-exclusivo bit a bit) com chave unicas e aleatorias do tamanho do texto claro
 

 



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