A cryptography student has accidentally used the same keystream to encrypt two different messages, M1 and M2. We know that the Ox2b1d510e6a67ae98. ciphertexts are Cı = 0x2e38ac20fe51b68c and C2 = 0x638cd0bla9114b4d. We also happen to know that M1 a) What is M2 in hexadecimal? Please give your answer a leading Ox and use lowercase letters only. b) What is the keystream? Please give your answer a leading Ox and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.

A cryptography student has accidentally used the same keystream to encrypt two different messages, M1 and M2. We know that the Ox2b1d510e6a67ae98. ciphertexts are Cı = 0x2e38ac20fe51b68c and C2 = 0x638cd0bla9114b4d. We also happen to know that M1 a) What is M2 in hexadecimal? Please give your answer a leading Ox and use lowercase letters only. b) What is the keystream? Please give your answer a leading Ox and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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Alice wishes to tell Bob about the animal she saw at the zoo Alice and Bob share the key stream 1101 1001 0000 1010 1110 1101 Alice creates a 3-character ASCII message, encodes it, and sends it to Bob. This is the ciphertext: 1001 1111 0100 0101 1011 0101 Bob deciphers the message. What animal did Alice see at the zoo?
In XOR Cipher, encoding is done by an XOR operation on two given strings. If the strings are of different lengths then the output should be the length of the shorter string. Cut the length of the longer string to the same size as the smaller string before XOR operation. Given two strings of msg1 and msg2, return the encoded message. Examples xor_cipher ("11", "22") "33" # 11 XOR 22 = 33 RUBY xor_cipher ("1020304", "403201") xor_cipher ("c611d9bdd9de38b9eb", "23a0745505d4d25494") "e5b1ade8dc0aeaed7f" "501231"
An animal name has been encoded using the letter to number correspondence abcde t 8hij k 1 m nop qrstuVH x y z e 1 2 3 4 5 6 7 8 9 18 11 12 13 14 15 16 17 18 19 28 21 22 23 24 25 and the encryption function e :n + (n + 2) mod 26 The result is the secret identification kiwcpc . What is the animal? The answer will be a nonsense word (no numbers).
Fast and correct solution please.
that the ciphertexts are C = 0xbcc61793955b5eb5 and C2 = 0xdea2c2 fd718d3b77. We also happen to know that M1 A cryptography student has accidentally used the same keystream to encrypt two different messages, M1 and M2. We know Оx805d3а2029c0а386. a) What is M2 in hexadecimal? Please give your answer a leading 0x and use lowercase letters only. b) What is the keystream? Please give your answer a leading Ox and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.
The ciphertext below was encrypted using a substitution cipher. In your favorite language (in C++ or Python) decrypt the ciphertext without knowledge of the key using frequency analysis lrvmnir bpr sumvbwvr jx bpr lmiwv yjeryrkbi jx qmbm wi bpr xjvni mkd ymibrut jx irhx wi bpr riirkvr jx ymbinlmtmipw utn qmumbr dj w ipmhh but bj rhnvwdmbr bpr yjeryrkbi jx bpr qmbm mvvjudwko bj yt wkbrusurbmbwjk lmird jk xjubt trmui jx ibndt wb wi kjb mk rmit bmiq bj rashmwk rmvp yjeryrkb mkd wbi iwokwxwvmkvr mkd ijyr ynib urymwk nkrashmwkrd bj ower m vjyshrbr rashmkmbwjk jkr cjnhd pmer bj lr fnmhwxwrd mkd wkiswurd bj invp mk rabrkb bpmb pr vjnhd urmvp bpr ibmbr jx rkhwopbrkrd ywkd vmsmlhr jx urvjokwgwko ijnkdhrii ijnkd mkd ipmsrhrii ipmsr w dj kjb drry ytirhx bpr xwkmh mnbpjuwbt lnb yt rasruwrkvr cwbp qmbm pmi hrxb kj djnlb bpmb bpr xjhhjcwko wi bpr sujsru msshwvmbwjk mkd wkbrusurbmbwjk w jxxru yt bprjuwri wk bpr pjsr bpmb bpr riirkvr jx jqwkmcmk qmumbr cwhh urymwk wkbmvb a) Frequency analysis:…
An animal name has been encoded using the letter to number correspondence abc de f 8hijk 1 m nopP arstu vH x y z e 1 2 3 4 5 6 7 8 9 1e 11 12 13 14 15 16 17 18 19 28 21 22 23 24 25 and the encryption function e:n + (n + 2) mod 26 The result is the secret identification kiwcpc . What is the animal? The answer will be a nonsense word (no numbers).
Messages are to be encoded using the RSA method, and the primes chosen are p “ 17 and q “ 19, so that n “ pq “ 323, and e “ 19. Thus, the public key is p323, 19q. (a) Show that the decryption exponent d (your private key) is 91.
Decrypt Using these two prime numbers p: 11472448678961361675809388014248341 q: 46838031327322626556194693766252933 an RSA public key was constructed (these are same prime numbers we used in class) and the following message (an encoded palindromic sentence) has been sent to you: s: 206852398229333288394377911072663657292972237656591756203408205688278 What is that palindromic sentence?
Alice encrypts a message using AES, and sends the ciphertext to Bob. Unfortunately, during the calculation of the third block, a lightning struck Alice’s house, corrupting the 2nd bit of the AES output (for the third block). Fortunately, nothing else of the calculation was affected. How much of the plaintext can Bob still recover if the mode of encryption is one of the followings: CBC, CFB, OFB, or CTR?
Plz don't use chat gpt
Suppose that we decide to use the 8-bit ASCII encoding for alphabetic charac- ters with block size of one character (or letter). Using the RSA cryptosystem, let the public key is (2993, 217), where the two primes p = 41 and q = 73. Determine the private key (n, e) and encrypt some characters (not necessarily all characters - but make sure you include the first character "M" in the one you choose) of the word "MONEY", where M = 77, O = 79, N = 78, E = 69, Y = 89 according to the 8-bit ASCII encoding table. Show ALL workings.