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Figure 3.1 shows the general idea behind a symmetric-key Figure 3.1 shows the general idea behind a symmetric-key cipher. Figure 3.1 General idea of symmetric-key cipher. Figure 3.2 Locking and unlocking with the same key. The resistance of the cipher to attack must be based only on the secrecy of the key.. Figure 3.3 Cryptanalysis attacks. Figure 3.4 Ciphertext-only attack....
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Figure 5.1 A modern block cipher. If there are 10 1’s in the ciphertext, how many trial-and-error tests does 10 1’s in the ciphertext, how many trial-and-error tests does Eve need to do to recover the plaintext from the intercepted Eve need to do to recover the plaintext from the intercepted ciphertext in each of the following cases?. ciphertext in...