IH A cryptography student has accidentally used the same keystream to encrypt two different messages, M1 and M2. We know that theciphertexts are C¡ = 0x2e38ac20ƒe51b68c and C2 = 0x638cd0bla9114b4d. We also happen to know that M1 = 0x2b1d510e6a67ae98.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.

a) Given that same keystream is used to encrypt different messages, so we can recover the message…

Answered: IH A cryptography student has…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

The following figure is the Cipher Block Chaining (CBC) mode to encrypt large messages. Which of the followings statement is *correct* regarding this mode? IV m₁ m₂ m3 C3 m4 C4 m5 C5 If a message contains two identical 64-bit blocks, the corresponding ciphertext blocks are also identical. Switching the order of two cipher blocks will not cause any detectable error in the plaintext. Duplicating a cipher block will not cause any detectable error in the plaintext. Deleting a cipher block will cause some detectable error in the plaintext. m6 E encrypt with secret key C6
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:…
In a public-key system using RSA, you intercept the ciphertext C=10, sent to a user whose public key is e=5, n=35. What is the plaintext M? In an RSA system, the public key of a given user is e=31, n=3599. What is the private key of this user? Hint: First use trial-and-error to determine p and q; then use the extended Euclidian algorithm to find the multiplicative inverse of 31 module φ(n).
4
In what ways do these three features of TCP vary from those of UDP?
14- The following message has been encrypted using the Caesar cipher with key 22: ΥΗΚΟΑ PDA ZKΚN. Decrypt it. 15- Prove that for every positive integer n : 1·2· 3 + 2·3· 4+. . +n(n + 1)(n + 2) = n(n + 1)(n + 2)(n + 3)/4
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?
A cryptography student has accidentally used the same keystream to encrypt two different messages, M1M1 and M2M2. We know that the ciphertexts are C1=0x42e8ede51496d10cC1=0x42e8ede51496d10c and C2=0xa5ec5666da7419d0C2=0xa5ec5666da7419d0. We also happen to know that M1=0x713dc2f31c1e6c87M1=0x713dc2f31c1e6c87. a) What is M2M2 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 0x and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.
Note: The notation from this problem is from Understanding Cryptography by Paar and Pelzi. Consider the LFSR represented by the polynomial x¹ + x³ +x+1 What are the tap bits of the LFSR? Please enter your answer as unspaced binary digits (e.g. 010101 to represent p = 0, P4 = 1, P3 = 0, P2 = 1, P₁ = 0, Po = 1).
Give me answer please.

SEE MORE QUESTIONS

Recommended textbooks for you

Database System Concepts

Computer Science

ISBN:

9780078022159

Author:

Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:

McGraw-Hill Education

Starting Out with Python (4th Edition)

Computer Science

ISBN:

9780134444321

Author:

Tony Gaddis

Publisher:

PEARSON

Digital Fundamentals (11th Edition)

Computer Science

ISBN:

9780132737968

Author:

Thomas L. Floyd

Publisher:

PEARSON

Database System Concepts

Computer Science

ISBN:

9780078022159

Author:

Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:

McGraw-Hill Education

Starting Out with Python (4th Edition)

Computer Science

ISBN:

9780134444321

Author:

Tony Gaddis

Publisher:

PEARSON

Digital Fundamentals (11th Edition)

Computer Science

ISBN:

9780132737968

Author:

Thomas L. Floyd

Publisher:

PEARSON

C How to Program (8th Edition)

Computer Science

ISBN:

9780133976892

Author:

Paul J. Deitel, Harvey Deitel

Publisher:

PEARSON

Database Systems: Design, Implementation, & Manag…

Computer Science

ISBN:

9781337627900

Author:

Carlos Coronel, Steven Morris

Publisher:

Cengage Learning

Programmable Logic Controllers

Computer Science

ISBN:

9780073373843

Author:

Frank D. Petruzella

Publisher:

McGraw-Hill Education

SEE MORE TEXTBOOKS