Sumários
Cryptoanalysis of Modern Cryptosystems
28 fevereiro 2019, 13:00 • Paulo Alexandre Carreira Mateus
Linear and Differential cryptanalysis of S-boxes. AES. Feistel Ciphers. Modes.
Modern cryptosystems.
25 fevereiro 2019, 15:30 • Paulo Alexandre Carreira Mateus
Hill cipher. Know plaintext attacks to linear transformations in modules over Z_m. Types of attacks. Substitution box. Substitution Permutation network. Piling-up lemma.
Modern cryptosystems.
25 fevereiro 2019, 15:30 • Paulo Alexandre Carreira Mateus
Hill cipher. Know plaintext attacks to linear transformations in modules over Z_m. Types of attacks. Substitution box. Substitution Permutation network. Piling-up lemma.
Historical cryptosystems.
21 fevereiro 2019, 13:00 • Paulo Alexandre Carreira Mateus
Shift, affine and permutation cipher. Some basic properties of the ring Zn. Invertible elements. Multiplicative subgroup. Euler Totient function. Cryptoanalysis of the permutation cipher base don frequency analysis. Viginère Cipher. Cryptoanalysis of the Viginère cipher. Vernam cipher. Perfect security. Shannon theorem about perfect security.
Historical cryptosystems.
21 fevereiro 2019, 13:00 • Paulo Alexandre Carreira Mateus
Shift, affine and permutation cipher. Some basic properties of the ring Zn. Invertible elements. Multiplicative subgroup. Euler Totient function. Cryptoanalysis of the permutation cipher base don frequency analysis. Viginère Cipher. Cryptoanalysis of the Viginère cipher. Vernam cipher. Perfect security. Shannon theorem about perfect security.