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* SM503M-2526PSA01 - Mathematics for Cryptography (INGE-1-INT, INGE-1-BN, INGE-1)
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Give the list of all elements that have an inverse in the answer is a list of values separates with commas, with no spacesexample : the list of invertible elements in is 1,3,7,9
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In calculate the inverse of .The answer is an integer number between 0 et 23If has no inverse, the expected answer is : "no inverse"
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what is the value of : ?
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what is the value of : ?
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What is the (u,v) couple computed by the Extended Euclid algorithm such that : 1806.u+1372.v = pgcd(1806,1372) ?The answer should be a (u,v) couple of integer numbers. For example, if you have found that u = 31 and v = -12, the expected answer is (31,-12)
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What is the (u,v) couple computed by the Extended Euclid algorithm such that : 2988.u+2403.v = pgcd(2988,2403) ?The answer should be a (u,v) couple of integer numbers. For example, if you have found that u = 31 and v = -12, the expected answer is (31,-12)
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durée estimée : 15 MinutesThe alphabet contains characters, we use an affine Vigenere's transformation system based on 2x2 matrices .Here are two ciphering keys :1) Among those two keys, only one is correct. Which of the two keys is correct ?2) Calculate the deciphering key corresponding to the correct key.3) Decipher the following bigram : .
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durée estimée : 15 MinutesThe alphabet contains characters, we use an affine Vigenere's transformation system based on 2x2 matrices .Here are two ciphering keys :1) Among those two keys, only one is correct. Which of the two keys is correct ?2) Calculate the deciphering key corresponding to the correct key.3) Decipher the following bigram : .
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You receive the following ciphertext: .
Decipher the message knowing that it has been enciphered using an affine transformation on digraphs, using the usual alphabet of 26 letters (a=, b=, etc) and with the following enciphering key:
.
Your answer will be a word (no capital letters).
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In calculate the inverse of .The answer is an integer number between 0 et 28If has no inverse, the expected answer is : "no inverse"
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