Principles of Information Security
5th Edition
ISBN: 9781285448367
Author: Michael E. Whitman, Herbert J. Mattord
Publisher: Course Technology
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Chapter 8, Problem 4E
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Advanced Encryption Standard:
It is a cipher technique, which is chosen by U.S. government that secures the data. This method used to protect the data against unauthorized access. It has following features:
- Compared to other cipher technique, it is secure to transact the files.
- Cost effective and memory efficient.
Overview of development and implementation of cryptosystem which is given in “FIPS 197” standard:
- According to “FIPS 197” standard, “Rijndael”
algorithm process the data blocks of 128 bits using various cipher key lengths such as 128bits, 192 bits, and 256 bits. These key lengths can be referred as “AES-128”, “AES-192”, and “AES-256”. - The AES algorithm is adopted by U...
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[5 marks] Give a recursive definition for the language anb2n where n = 1, 2, 3, ... over the alphabet Ó={a, b}.
2) [12 marks] Consider the following languages over the alphabet ={a ,b},
(i) The language of all words that begin and end an a
(ii) The language where every a in a word is immediately followed by at least one b.
(a) Express each as a Regular Expression
(b) Draw an FA for each language
(c) For Language (i), draw a TG using at most 3 states
(d) For Language (ii), construct a CFG.
Question 1 Generate a random sample of standard lognormal data (rlnorm()) for sample size n = 100. Construct histogram estimates of density for this sample using Sturges’ Rule, Scott’s Normal Reference Rule, and the FD Rule. Question 2 Construct a frequency polygon density estimate for the sample in Question 1, using bin width determined by Sturges’ Rule.
Generate a random sample of standard lognormal data (rlnorm()) for sample size n = 100. Construct histogram estimates of density for this sample using Sturges’ Rule, Scott’s Normal Reference Rule, and the FD Rule.
Chapter 8 Solutions
Principles of Information Security
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