ephemeral key for two plaintexts, ₁ and 2. The eavesdropper Eve suspects that ₁

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...
icon
Related questions
Question
Alice and Bob are using the ElGamal cipher with the parameters p = 131 and a = 2.
Alice makes the mistake of using the same ephemeral key for two plaintexts, ₁ and ₂. The eavesdropper Eve suspects that x₁ = 87. She sees the two
ciphertexts y₁ = 87 and y₂ = 121 in transit; these are the encryptions of ₁ and ₂, respectively.
a) What is the masking key km?
b) What is the plaintext x₂?
Transcribed Image Text:Alice and Bob are using the ElGamal cipher with the parameters p = 131 and a = 2. Alice makes the mistake of using the same ephemeral key for two plaintexts, ₁ and ₂. The eavesdropper Eve suspects that x₁ = 87. She sees the two ciphertexts y₁ = 87 and y₂ = 121 in transit; these are the encryptions of ₁ and ₂, respectively. a) What is the masking key km? b) What is the plaintext x₂?
Expert Solution
steps

Step by step

Solved in 2 steps with 1 images

Blurred answer
Recommended textbooks for you
Computer Networking: A Top-Down Approach (7th Edi…
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
Computer Organization and Design MIPS Edition, Fi…
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
Network+ Guide to Networks (MindTap Course List)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
Concepts of Database Management
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
Prelude to Programming
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
Sc Business Data Communications and Networking, T…
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY