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Asked: 2026-05-20T05:25:36+00:00

I have been given this hypothetical problem: Osama returns from the dead and wants

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I have been given this hypothetical problem:

“Osama returns from the dead and wants revenge. He now wants to communicate with his sleeper cells around the world and plan an attack. But he has to make sure know one else gets it and hence, will like to send it in an encrypted form. He’s recruited you for the job. Design a system with encryption and decryption modules for the text message.”

I am currently considering following scheme for encryption/decryption:

enter image description here

Now I want to know about the best PKC and SKC and Hash function for implementing above scheme.I did a bit of research over net on best algorithm and narrowed my algorithm choices to following:

Hash:MD5

PKC:RSA or Diffie-Hellman

SKC:DSA

Can you please suggest if there is something that I am missing or any better/new algorithem available.

I am planning to implement this in python.

EDIT:

After reading replies I think I should go with followings:

Hash:SHA-2

PKC:ECC

SKC:AES

Any advice on python library that will provide these algorithm.

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1 Answer

  1. Editorial Team

    If you really want “better” algorithms:

    Hash: any of SHA-2 family (sha-224/256/384/512)

    PKC: ECC (Elliptic Curve Cryptography)

    Other related info: Elliptic curve Diffie–Hellman, Elliptic Curve DSA

    Also read Applied Cryptography and other books by Bruce Schneier

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