CS-703 (A) RGPV B.Tech
Cryptography & Information Security (CIS)
Previous year papers and the official syllabus are free to read, no account needed.
Previous Year Papers
4 papers, latest Dec 2025
- CS-703 (A) paper, Dec 2025
- CS-703 (A) paper, Jun 2025
- CS-703 (A) paper, Nov 2023
- CS-703 (A) paper, Nov 2022
Syllabus, notes and important questions for CS-703 (A)
Syllabus units
Topics as the official RGPV syllabus lists them.
Unit 1 Mathematical Background for Cryptography 16 topics
- Abstract Algebra
- Number Theory
- Modular Inverse
- Extended Euclid Algorithm
- Fermat's Little Theorem
- Euler Phi‑Function
- Euler's theorem
- Principles of Cryptography
- Classical Cryptosystem
- Cryptanalysis on Substitution Cipher (Frequency Analysis)
- Play Fair Cipher
- Block Cipher
- Data Encryption Standard (DES)
- Triple DES
- Modes of Operation
- Stream Cipher
Unit 2 Advanced Encryption Standard and Public‑Key Cryptosystem 11 topics
- Advanced Encryption Standard (AES)
- Introduction to Public Key Cryptosystem
- Discrete Logarithmic Problem
- Diffie‑Hellman Key Exchange
- Computational & Decisional Diffie‑Hellman Problem
- RSA Assumptions & RSA Cryptosystem
- RSA Signatures & Schnorr Identification Schemes
- Primality Testing
- Elliptic Curve over the Reals
- Elliptic Curve modulo a Prime
- Chinese Remainder Theorem
Unit 3 Message Authentication, Digital Signatures, Key Management and Hash Functions 13 topics
- Message Authentication
- Digital Signature
- Key Management
- Key Exchange
- Hash Function
- Universal Hashing
- Cryptographic Hash Function
- MD (Message Digest)
- Secure Hash Algorithm (SHA)
- Digital Signature Standard (DSS)
- Cryptanalysis: Time‑Memory Trade‑off Attack
- Differential Cryptanalysis
- Secure channel and authentication system (Kerberos)
Unit 4 Information Security and Network Security 18 topics
- Threats in Networks
- Network Security Controls – Architecture
- Wireless Security
- Honeypots
- Traffic Flow Security
- Firewalls – Design and Types of Firewalls
- Personal Firewalls
- Intrusion Detection Systems (IDS)
- Email Security – Services and attacks through emails
- Privacy‑Authentication of source message
- Pretty Good Privacy (PGP)
- S‑MIME
- IP Security – Overview of IPSec
- IPv6 Authentication
- Encapsulation Security Payload (ESP)
- Internet Key Exchange (IKE)
- Web Security – SSL/TLS and basic security protocols
- Secure Electronic Transaction (SET) encoding
Unit 5 Cryptography and Information Security Tools 8 topics
- Spoofing tools (e.g., Arping, etc.)
- Footprinting tools (nslookup, dig, Whois, etc.)
- Vulnerability scanning tools (Angry IP, HPing2, IP Scanner, Global Network Inventory Scanner, Net Tools Suite Pack)
- NetBIOS enumeration using NetView tool
- Steganography tools (STools, Steghide, Steganos, Stegdetect, StegSpy)
- Trojan detection tools (Netstat, fPort, TCPView, CurrPorts, Process Viewer)
- LAN scanner tools (look@LAN, Wireshark, Tcpdump)
- DoS attack understanding tools (Jolt2, Bubonic.c, Land and LaTierra, Targa, Nemesy Blast, Panther2, Crazy Pinger, Some Trouble, UDP Flood, FSMax)
Exam insights
Counted from 4 past CS-703 (A) papers.
Marks asked per paper, by unit
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Unit 1 Mathematical Background for Cryptography 26 marks
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Unit 2 Advanced Encryption Standard (AES) 21 marks
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Unit 3 Message Authentication, Digital Signature 19 marks
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Unit 4 Information Security 26 marks
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Unit 5 Cryptography and Information Security Tools 19 marks
Average marks of the questions from each unit in one paper. You answer only some of them, so the total is more than the paper’s maximum.
Asked again and again
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What is a digital signature and explain the Digital Signature Standard (DSS) including signature generation and verification with block diagram.
Asked 4 times: 2025, 2023, 2020
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Define firewall and explain its types/design and its role/use in network security architecture.
Asked 3 times: 2025, 2020
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Perform RSA encryption and decryption numerically given $p, q, e$ and plaintext $m$ (compute $n, \phi(n), d$ and ciphertext).
Asked 2 times: 2025