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Compare and contrast the hash algorithms used in PGP and S/MIME.
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Explain how does tunnel mode provide protection to the IP Packets.
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Find greatest common divisor of 161 and 28 by using Extended Euclidean Algorithm.
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Define the Codes.
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Define the Ciphers.
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Define the Confusion.
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Define the Diffusion.
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Explain Hill Cipher Technique by taking a suitable example.Discuss any two disadvantages of Hill Cipher Technique.
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Briefly discuss Differential Cryptanalysis Attack in DES.
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Give a detail description of single round of DES algorithm.
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Explain the steps in Playfair Cipher technique.
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Explain Diffie Hellman key exchange and explain how does it suffer from Man-in-Middle attack.
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Explain Time Domain and Frequency Domain Scramblers.
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Perform the encryption and decryption of the plain text, M-8, where recipients RSA public key are (0-77,c-17).
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Briefly explain Elliptic curve cryptography.
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Explain the Digital Signature Standard (DSS) approach to digital signatures.
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What are some weaknesses of a Packet - filtering router.
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Explain the various steps involved in the Secured Socket Layer(SSL) Record Protocol transmission.
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Discuss, Oakley Key Determination Protocol in IPSec.
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Explain in detail the TMN Architecture.
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Briefly explain TMN management service architecture.
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Discuss some implementation issues of TMN
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Write the algorithm to compute xy mod z for very large values of x and y.
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Differentiate between passive and active attacks. Name some passive attacks.
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What are the characteristics of a secure hash function?
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Define the Brute force attack Terms briefly.
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Define the Replay attack Terms briefly.
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Define the Differential Cryptanalysis attack Terms briefly.
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Discuss how does DES use the Initial Permutation concepts.
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Discuss how does DES use the Final Permutation concepts.
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Discuss how does DES use the S-box concepts.
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Discuss how does DES use the XOR operation concepts.
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Discuss how does DES use the Round key generator concepts.
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Discuss the Difference between Stream Cipher and Block Cipher.
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Discuss the Difference between Substitution Technique and transposition technique.
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Discuss the Difference between Electronic Code book Mode and Cipher Block Chaining Mode.
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Explain the key Generation and Encryption / Decryption Process of RSA algorithm. Explain the RSA based digital Signature Mechanism.
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Explain how do Alice (sender) and Bob (Recipient) get the same keyin a -insecure channel by Using Diffie Hellman key exchange algorithm. Explain limitation of Diffie-Hellman Scheme.
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Differentiate between Time Domain and Frequency Domain Scramblers.
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Explain how does PGP incorporates the Confidentiality security leatures.
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Explain how does PGP incorporates the Integrity security leatures.
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Explain how does PGP incorporates the Authentication security leatures.
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Explain how does PGP incorporates the Compression security leatures.
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Explain How does IPsec manage to counter Replay attack?
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Discuss the various processes involved in SHA-512.
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Explain in detail the TMN Functional Architecture and Informational Architecture.
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Write Notes on Firewall design Principle.
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Write Notes on TMN Reference Point.
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Write Notes on TMN services.
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a. With a neat diagram, explain network access security model with gate keeper function.
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b. Classify and explain different type of attacks.
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c. Using the keyword "ENCRYPT" create playfair matrix and obtain ciphertext for the message "MATCHFIXED". Also write the rules used.
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a. Explain single round of DES along with the key generation.
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b. Explain the working of counter mode of block cipher operation.
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c. Discuss the final evaluation criteria of AES.
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a. Justify how both confidentiality and authentication are obtained in publickey cryprosystems.
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b. Write RSA algorithm.
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c. In Diffie Hellman key exchange q = 71, its primitive root  = 7 A's private key is 5 B's
private key is 12. Find: i) A's public key; ii) B's public key, iii) Shared secret key.
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d. Explain the distribution of secret key using the public key cryprography with confidentiality and authentication.
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a. List out the requirements and explain the arbitrated digital signature technique.
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b. Compare RSA and DSS approach.
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c. Illustrate replay attack with examples.
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a. Explain the key requirements and features of SET.
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b. Discuss SSL record in terms of fragment compression and encryption.
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a. Explain password selection strategies.
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b. Describe statistical anomaly detection.
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c. Discuss the different categories of intruders.
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a. Give the taxonomy of malicious programs, Briefly explain all the software threats.
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b. Describe digital immune system with diagram.
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c. Brief on four generations of Antivirus software.
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a. What is firewall? Explain the various firewall configurations with relevant diagram.
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Write short note on: i) Data Access Control
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Write short note on: ii) Concept of Trusted system
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What are the basic requirement of Secure Electronic Transaction?
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What are the two basic components of the network security model?
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Explain any four functions of S/MIME.
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Mention the significance of a trup-door one way key functio in public encryption systems.
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Compare the characteristics of Link and End-to-End Encryption schemes.
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Define steganography?What are various technique used in steganography?
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Define the features of Stream ciphers with an example.
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What in the difference between direct and arbitrated digital signatures?
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What are the essential ingredients of a public-key directory?
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On the elliptic curve over the real numbers Y2x3 -36x, let (-3.5.9.5) and Q=(-2.5, 8.5). Find P+Q and 2P.
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What is the purpose of the X.509 standard and how is an X.509 certificate can be revoked?
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In PGP'scheme, what is the expected number of session key generated before a previously created session key is produced? Wat is the probability that a user with N public keys will have at least of duplicate key ID?
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What is the difference between Secure Sockets Layer (SSL Connection and SSL session? Explain.
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Explain the functioning of Telecommunications Management network(TMN) layers.
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How does TMN information model provide security management?Explain.
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Explain the functioning of a digital immune system? Give an instration,
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What is IP Spoofing? Explain the vulnerabilities.
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Explain authentication and non-repudiation.
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Explain the dimensions and approaches of cryptogphy and cryptanalysis.
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Explain briefly the types of Block Cipher Modes and their typical applications.
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Compare and contrast Caesar cipher and Playfair cipher.
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Write short notes on Firewalls.
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Write short notes on Security characteristics of OSI architecture.
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Write short notes on IP security architecture.
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Write short notes on MIME.
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Write short notes on DES and variants.
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Attempt any five of the following: (a) Write a short note on Pretty Good Privacy (PGP).
(b) List four general categories of schemes for the distribution of public key,
(c) What are the roles of public key and private key?
(d) Write a short note on network management services,
(e)What is cryptanalysis? Differentiate between linear and differential
Cryptanalysis. (f)Explain playfair cipher substitution technique. What are its drawbacks?
(g) Explain the working of rotor machines.
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List and briefly define types of cryptanalytic attacks based on what is known to attacker.
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What is the difference between monoalphabetic cipher and a polyalphabetic cipher? Encrypt the plaintext wearecseitstudents using keyword deceptive.
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Define the following terms with reference to DES - (i)Meet-in-the-middle attack
(ii)Key generation
(iii)Expansion/Permutation
(iv) S box
(v) Avalanche effect
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Name various block cipher modes of operations. Explain output feedback mode in detail.
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Explain the key generation and encryption/decryption process of RSA algorithm with example.
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What is elliptic curve cryptography? How Diffie-Hellman key exchange algorithim implemented using elliptic curves?
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How speech signals can be encrypted? Describe digital and analog system of speech encryption.
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Define data compression. Differentiate between lossless and lossy compression.
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Discuss, Oakley Key Determination Protocol in IPSec.
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Explain SSL (Secure Socket Layer) protocol stack. What is the difference between SSL connection and SSL session?
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Explain digital signatures. How arbitrated digital signature is better than direct digital signature?
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What is a scrambler? What are the three types of inversions used in speech scrambler?
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Describe the telecommunication network architecture and discuss TMN management layers.
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Define (i) Components of network architecture (ii) Structure of management information (iii)Types of telecommunication network (iv) Management information model
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