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Mid terms IMPs for CNS GTU IT Semester 6

CNS (Cryptography and Network Security) covers encryption techniques, network security protocols, and cyber threat protection. It ensures secure communication, data integrity, and confidentiality in digital systems.

Out of 30+ question banks, here are the top 10 questions from all the modules👇. (For additional resources, be sure to check out the website.)


  1.  Explain Elgamal Digital Signature Scheme

  2. Explain Cipher Block Chaining (CBC) and Electronic Code Book (ECB) block cipher modes of operation with the help of diagram.

  3. Encrypt the message "meet me at the usual place at ten rather than eight o'clock" using the Hill cipher with the key 9 4 5 7.

  4. Differentiate block cipher and stream cipher. 

  5. Explain working of Secure Hash Algorithm, with basic arithmetical and logical functions used in SHA.

  6. Explain the key generation in the DES algorithm.

  7. Discuss in detail the encryption and decryption process of AES. 

  8. What do you mean by key distribution? Give at least one method for key distribution with proper illustration. 

  9. Explain cryptanalytic attacks with examples of any encryption algorithm.

  10. Explain HTTPS and SSH.

These important questions are your guide—study them well, practice consistently, and approach your exams with confidence. Success follows preparation!!

For answers, check out the new BH website!! Plus, here are all the other resources BH has to offer:

  • Bh.Papers-Highly Analyzed Past Year Question Papers

  • Bh.How to Pass- IMP plans to clean a subject

  • Bh.Questionbanks-IMP* Questions per module

  • Bh.Solutions (soon)-Past Paper’s Solutions

  • Bh.Notes-Q/A format module wise notes

  • Bh.Library-References and Textbooks

  • Bh.VIVAs-Q/A format VIVA/Oral Kit

  • Bh.Sample Papers-IMPs for mid terms & unit tests





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