Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Can you devise a meet-in-the-middle attack for a triple DES?
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- Write a complete bash script that monitors who logs in and logs out of the current CSELinux machine (e.g., cse01, cse02, etc.) where the script is running. In particular, youwill check the status of who is logged in every 10 seconds and report each user ID thatlogs in or logs out during that time frame. Note that there may be more than one userthat logs in or out duringthis interval. You must include the host name when reportingthe user ID information. In addition, you will install a custom signal handler to trap theSIGINT(i.e.,^C)onetimebeforeyouareabletoterminatethescriptwiththeSIGINT.You will also print out the current date and time and report the number of users loggedin,even if there are no changes (i.e.,no one logged in or out during the interval). HOW TO DO THIS? PLEASE EXPLAIN WITH ANSWER!!arrow_forwardYou have already made a file that can be used to hit the target server with a dictionary attack even if salt is not used. If you take out the word "impossible," the file has 171,000 words from the OED. The dictionary is now out of date because the 32-bit salt server was changed. You want to make a new dictionary so you can use raw force to find words in an existing one. How many words are in the new book all together?arrow_forwardWrite a complete bash script that monitors who logs in and logs out of the current CSELinux machine (e.g., cse01, cse02, etc.) where the script is running. In particular, youwill check the status of who is logged in every 10 seconds and report each user ID thatlogs in or logs out during that time frame. Note that there may be more than one userthat logs in or out duringthis interval. You must include the host name when reportingthe user ID information. In addition, you will install a custom signal handler to trap the SIGINT(i.e.,^C) one time before you are able to terminate the script with the SIGINT. You will also print out the current date and time and report the number of users loggedin,even if there are no changes (i.e.,no one logged in or out during the interval). HOW TO DO THIS? PLEASE EXPLAIN WITH ANSWER!!arrow_forward
- 2. Describe the flaw in this argument: Consider the following attack against one-time pad: upon seeing a ciphertext c, the eavesdropper tries every candidate key k e {0,1}^ until she has found the one that was used, at which point she outputs the plaintext m. This contra- dicts the argument in the book that the eavesdropper can obtain no information about m by seeing the ciphertext.arrow_forwardA certain university is considering the purchase of N95 masks to distribute to their students for protection against the next variant of the covid virus. They found a reliable distributor who offers N95 masks with a quantity discount. The pricing is shown below. Number of N95 masks Price per mask From To 500 $1.23 501 2000 $0.98 2001 5000 $0.62 5001 or more $0.53 For example, if the university purchases 700 masks the price is 500 × $1.23 = $615.00 for the first 500 masks plus (700 – 500) × $0.98 = $196.00 for the next 200 masks for a total of $615.00 + $196.00 = $811.00. Write a MATLAB program that first prompts the user to input the number of masks. Use the following prompt: Please enter the number of N95 masks: Then, based on the number entered and the above table, calculate the purchase price. Output to the command window the number of masks and the purchase price as follows: Your price for xXXx N95 masks is $xxx.xx where xxxx is the number of masks and $xxx.xx is the price. If the…arrow_forwardIn this project, you are required to do socket programming in C language (Linux environment) to implement a pair of client and server that can achieve simple password verification to indicate the current market value of the stock. Your client will send a pair of username and password to your server and your server will verify whether the pair of username and password is legitimate or not for retrieving the stock value. Assume the only legitimate pairs of usernames and passwords that will be accepted by your server are as follows. Username Password StockValuelcid welpa23e 13.93mrvl ghqwo31a 41.23snap tyjli14d 10.21cl1 rjwqe83f 85.09bro gnmds28z 56.43cvs rhktl87c 91.34 StockFile.txt Specifically, your client and server programs entail to achieve the following requirements:1. Your client program…arrow_forward
- What is the difference between git commit and git push ? A. push stores all staged changes in the local repository, commit sends all changes in the local repository to the remote repository B. There is no difference, they are just two names for the same thing C. commit stores all staged changes in the local repository, push sends all changes in the local repository to the remote repository D. push forces everyone else to immediately download your code, while commit only sends your changes to the remote repository without forcing everyone to download your code immediatelyarrow_forwardHow to modify exitstatus.sh to print a message for each of the three exit statuses described in man ls. 0 - OK 1 - minor problem 2 - serious problem exitstatus.sh #!/bin/bash ls > /dev/null if [ $? -eq 0 ]; then echo "It seems to have worked, exit status 0" fi ls asdf 2> /dev/null if [ $? -eq 0 ]; then echo "It seems to have worked, exit status 0" else echo "An error occured, non-zero exit code." fi Solve fast pleasearrow_forward
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