Answered: iiii.___________accepts a variable-size…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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iiii.___________accepts a variable-size message M as input and produces a fixed-size
message digest H(M).
a) Block cipher
b) Stream cipher
c) Public key
d) Hash Function
iv. For the secure exchange of messages with a new entity without a prior arrangement,
which one of the cryptographic entities is useful?
a) Block cipher
b) MAC
c) Asymmetric encryption
d) Hash function.
i. Modifying an encrypted message without understanding its contents will result in issue.
• Confidentiality
• Availability
• Integrity
• Repudiation
ii. An attacker breaks into your personal computer and deletes some important files is an
example of ___________attack
• Ciphertext
• Passive
• Ransomware
• Active
iii. _____ accepts a variable-size mes:age M as input and produces a fixed-size message
digest H(M).
• Block cipher
• Public Key encryption
• Stream Cipher
• Hash-function iv. A

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