Suppose Alice want to share a plain text $x = 5$ to Bob; using RSA, DHKE, and El-Gamal.

My question is if Man-in-the-middle attack is applied then weather oscar can compute/decrypt plain text in all of the algorithms if yes then let me how Oscar will decrypt the plain text using the following information

  • In RSA: $p= 3, q=11, d=7, e=3$
  • In Elgamal: $\alpha= 2. p=29$, Alice key $A=3$, Bob Key $B=7$
  • In DHKE: $\alpha= 2, p=29$, Alice key $A=3$, Bob Key $B=7$

Please let me how Oscar will get the plain text $x = 5$

  • $\begingroup$ Welcome to Cryptography. Is this homework? What have you tried so far? $\endgroup$ – kelalaka Jan 23 '19 at 20:52
  • $\begingroup$ Thanks its an assignment and research problem, I have tried using RSA but can't get the plain text at Oscar end $\endgroup$ – Hafiz Siddiq Jan 23 '19 at 20:54
  • $\begingroup$ You can use $\LaTeX$ here with Mathjax. Edit your question to show your work, so we can help you. $\endgroup$ – kelalaka Jan 23 '19 at 20:55

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