EBK SOFTWARE ENGINEERING
10th Edition
ISBN: 9780133943238
Author: SOMMERVILLE
Publisher: PEARSON CO
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Chapter 14, Problem 14.8E
Explanation of Solution
Recognition resistance and strategies:
If the user is trying to move the prices from one trading system to another by making unauthorized access, the recognition, resistance and recovery strategies come into force so as to prevent it.
- With the use of recognition strategy, the operators of the system identify the unauthorized prices movement, which leads to system failure. The system then sends text messages to all the users that an unauthorized person is making the changes in prices.
- With the use of resistance strategy, the critical parts of the system are focused as it identifies the possibility of any cyber-attack on any trading system. As financial trading plays a vital role, it is focused in it.
- With the use of this strategy, the critical services of the system can be restored when the failure of system is occurred. With this the important trading information can be restored easily...
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Students have asked these similar questions
5. Word FrequencyWrite a program that reads the contents of a text file. The program should create a dictio-nary in which the keys are the individual words found in the file and the values are the number of times each word appears. For example, if the word “the” appears 128 times, the dictionary would contain an element with 'the' as the key and 128 as the value. The program should either display the frequency of each word or create a second file containing a list of each word and its frequency.
3.) File Encryption and DecryptionWrite a program that uses a dictionary to assign “codes” to each letter of the alphabet. For example:
codes = { ‘A’ : ‘%’, ‘a’ : ‘9’, ‘B’ : ‘@’, ‘b’ : ‘#’, etc . . .}Using this example, the letter A would be assigned the symbol %, the letter a would be assigned the number 9, the letter B would be assigned the symbol @, and so forth.
The program should open a specified text file, read its contents, then use the dictionary to write an encrypted version of the file’s contents to a second file. Each character in the second file should contain the code for the corresponding character in the first file.
Write a second program that opens an encrypted file and displays its decrypted contents on the screen.
Returns an US standard formatted phone number, in the format of
(xxx) xxx-xxxx
the AreaCode, Prefix and number being each part in order.
Testing Hint: We be exact on the format of the number when
testing this method. Make sure you think about how to convert
33 to 033 or numbers like that when setting your string format. Reminder
the %02d - requires the length to be 2, with 0 padding at the front if a single
digit number is passed in.
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