If a 2,048-bit plaintext message were encrypted with the El Gamal public key cryptosystem, how long would the resulting ciphertext message be?

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
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A. If a 2,048-bit plaintext message were encrypted with the El Gamal public key cryptosystem, how long would the resulting ciphertext message be? 

  1. 2048 bits
  2. 1024 bits
  3. 4096 bits
  4. 8192 bits

B.We have 100 users all need to communicate with each other. If we are using asymmetric encryption how many keys would we need? 

  1. 4950
  2. 300
  3. 2000
  4. 200

 

C.When we are using frequency analysis, what are we looking at?

  1. How often certain letters are used.
  2. How often messages are sent.
  3. How often pairs of letters are used.
  4. How many messages are sent.
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