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problem1 distinguish between message integrity and message authentication2 define the first criterion for a
problemhill ciphers and multiplicative ciphers arc very similar hill ciphers arc block ciphers using multiplication of
problem1 the encryption key in a transposition cipher is 3 2 6 1 5 4 find the decryption key2 show the matrix
problemeve secretly gets access to alices computer and using her cipher types abcdefghij the screen shows casdemfg1r if
problemencrypt the message this is an exercise using one of the following ciphers ignore the space between words
problemin each of the following ciphers what is the maximum number of characters that will he changed in the cipher
problemin each of the following ciphers what is the maximum number of characters that will be changed in the cipher
problemalice and bob have decided to ignore kirchhoffs principle and hide the type of the cipher they are usinga how
problemsuppose that spaces periods and question marks are added to the plainest to increase the key domain of simple
problemsome archeologists found a new script written in an unknown language the archeologists later found a small
problem1 list three mono alphabetic ciphers2 list three polyalphabetic ciphers3 list two transposition ciphers4 list
problem1 distinguish between a stream cipher and a block cipher2 are all stream ciphers mono alphabetic explain3 are
problem1 define a symmetric-key cipher2 distinguish between a substitution cipher and a transposition cipher3
problem1 if the key with parity bit 64 bits is 0123 abcd 2562 1456 find the first round key2 using a plaintext block of
problem1 prove the sixth design criteria for p-boxes by checking the destination of an arbitrary s-box2 prove the
problem1 check the fifth design criterion for s-box 4 using the following pairs of inputsa 001100 and 110000b 110011
problemgive a general fondle to calculate the number of each kind of transformation sub-bytes shift-rows mix-columns
problem1 what is the block size in des what is the cipher key size in des what is the round-key size in des2 what is
problem1 how many permutations are used in a des cipher algorithm how many permutations are used in the round-key
problem1 why does the round-key generator need a parity drop permutation2 what is the difference between a weak key a
problem1 show how the eight design criteria for s-box 7 are fulfilled2 prove the first design criterion for p-boxes by
problem1 draw the table to show the result of passing 000000 through all 8 s-boxes do you see a pattern in the outputs2
problemprove that the shift rows and in v shift rows transformations are permutations by doing the followinga show the
problem1 abs has a larger block size than des 128 versus 64 is this an advantage or dis-advantage explain2 aes defines
problemin a cipher s-boxes can be either static or dynamic the parameters in a static s-box do not depend on the keya