1.The use of computing for the encryption of information enabled the emergence of ciphers, where the encryption process is repeated countless times, using the entire key, parts or variations of it in a cyclical way, until producing the encrypted result, giving rise to what we call encryption. cyclical modern. The most well-known processes of this model are DES, 3DES and AES. Correctly associate each of these models with its description. (1) DES (2) 3DES (3) AES ( ) Cryptographic system considered a modification of its previous version. It has two variants, where in one of them 3 keys are generated (K1, K2, K3): K1 being used to encrypt the plain text; K2 decrypts the output of K1; and K3 encrypts the output of K2. ( ) Symmetric block symmetric key system. It has 128-bit data and 128/192/256-bit keys. It is an iterative cipher that is based on the “substitution-permutation network”. It performs all of its calculations in bytes rather than bits, and processing is through array. The number of rounds of the algorithm is variable and depends on the size of the key. ( ) Symmetric-key block cipher, with a block size to be encrypted of 64 bits, with 8 bits used only for verification. It is an implementation of a Feistel Cipher that uses 16 cycles of the Feistel framework. A weak point of this system is the size of the key, considered too short. The correct order is: A 1 – 2 – 3 B 1 – 3 – 2 C 2 – 1 – 3 D 2 – 3 – 1 E 3 – 2 – 1
1.The use of computing for the encryption of information enabled the emergence of ciphers, where the encryption process is repeated countless times, using the entire key, parts or variations of it in a cyclical way, until producing the encrypted result, giving rise to what we call encryption. cyclical modern. The most well-known processes of this model are DES, 3DES and AES. Correctly associate each of these models with its description.
(1) DES (2) 3DES (3) AES
( ) Cryptographic system considered a modification of its previous version. It has two variants, where in one of them 3 keys are generated (K1, K2, K3): K1 being used to encrypt the plain text; K2 decrypts the output of K1; and K3 encrypts the output of K2.
( ) Symmetric block symmetric key system. It has 128-bit data and 128/192/256-bit keys. It is an iterative cipher that is based on the “substitution-permutation network”. It performs all of its calculations in bytes rather than bits, and processing is through array. The number of rounds of the
( ) Symmetric-key block cipher, with a block size to be encrypted of 64 bits, with 8 bits used only for verification. It is an implementation of a Feistel Cipher that uses 16 cycles of the Feistel framework. A weak point of this system is the size of the key, considered too short.
The correct order is:
| A | 1 – 2 – 3 | |
| B | 1 – 3 – 2 | |
| C | 2 – 1 – 3 | |
| D | 2 – 3 – 1 | |
| E | 3 – 2 – 1 |
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