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Cryptography and Network Security: Digital signature schemes and authentication Protocols
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Avg score: 45% • Most missed: “Rabin Cryptosystem is a variant of the Elgamal Cryptosystem.”
Cryptography and Network Security: Digital signature schemes and authentication Protocols
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16 Questions

1. Rabin Cryptosystem is a variant of the Elgamal Cryptosystem.
2. What is cipher-block chaining?
3. In Elgamal cryptosystem, given the prime p=31., Choose e1= first primitive root of p and d=10, calculate e2.
4. SHA-1 produces __________ bit of hash.
5. What is the preferred way of encryption?
6. What is the role of Key Distribution Center?
7. What is not a role of encryption?
8. In Elgamal cryptosystem, given the prime p=31. Encrypt the message .
9. What is not an encryption standard?
10. Which Cryptographic system uses C1 = (e1r) mod p and C1 = (e2rx P) mod p at the encryption side?
11. What is the preferred way of encryption?
12. SHA-1 produces __________ bit of hash.
13. MD5 produces __________ bits hash data.
14. What is cipher-block chaining?
15. Which two of the following are authentication algorithms?
16. What is a Hash Function?

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