- Consider another carelessly written Web application, which uses a servletthat checks if there was an active session, but does not check if the user isauthorized to access that page, instead depending on the fact that a linkto the page is shown only to authorized users. What is the risk with thisscheme? (There was a real instance where applicants to a college admissionssite could, after logging into the Web site, exploit this loophole and viewinformation they were not authorized to see; the unauthorized access washowever detected, and those who accessed the information were punishedby being denied admission.)

Answered: Consider another carelessly written Web…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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The command “nmap 10.1.1.2” would perform a default scan against the specified target. Why do you need to know anything else about nmap? Think about what this exact command may or may not include. (Note: “In order to avoid being a scan monkey” is a good answer, but I need more than that.)
Create a spreadsheet that takes eight values that a user inputs into eight different cells. Then create a row that transposes the cells to simulate a transposition cipher, using the example transposition cipher from the text. Remember to work from right to left, with the pattern 1 > 3, 2 > 6, 3 > 8, 4 > 1, 5 > 4, 6 > 7, 7 > 5, 8 > 2 where 1 is the rightmost of the eight cells. Input the text ABCDEFGH as single characters into the first row of cells. What is displayed?
The Caesar Cipher Algorithm was introduced in Week #1. Encryption is the act of encoding a message with the intent of allowing only authorized people the knowledge of how to read that message. An encrypted message can be decoded, allowing the secured content to be read after decryption. Recall that the Caesar Cipher uses alphabets as the primary source of information but shifted a certain number of letters to the left or right as a key to create the encrypted data. The Caesar Cipher is easily hacked because of the simple technique used to build the key that encrypts and decrypts the data. In this lab, the key is the number of alphabets shifted, and the direction is always toward the increasing alphabetical order. This provides 26 ways of encrypting a message and therefore makes it easier to be hacked by guessing the key within the range of 0 - 25. Write the function caesar_hack( ) that takes three parameters: a Caesar Cipher encrypted message, an alphabet list, and the original…
Using the encryption and decryption methods, write a program called SDESMitm.java or sdesmitm.py that will carry out a meet-in-the-middle attack on 2SDES. This system encrypts a plaintext first with one key and then again with a different key. Please review the attack in the notes and the textbook. Recall that this is a known-plaintext attack. I will provide plaintext/ciphertext pairs. Based on those, you should be able to recover the two 9-bit keys. Write the program so that it can be run from the command line taking four parameters: plaintext 1 integer ciphertext 1 integer plaintext 2 integer ciphertext 2 integer Two pairs are needed because the first plaintext/ciphertext pair will let you create a short list of key pairs and the second plaintext/ciphertext pair will allow you to narrow that list down to one key pair. When run, the program should print the two keys. You can test your program on the plaintext/ciphertext pairs 0/247; 4095/2808. In my implemenation, the firat…
Using the Vigenère cipher, encrypt the word “explanation” using the key leg. Hint: You may use a Vigenère Table (shown below) to perform the polyalphabetic encryption process. Remember, a key is needed that is as long as the message.
Experimenting with AES-128 symmetric key cipher.using python PART 2: you will try to use "brute force" to decrypt an encrypted message, where you only have the first 96-bits of the 128-bit secret key (last 4 bytes of the secret key are missing!) The program should be called "findk", and should deal with two files that contain the encrypted text as a stream of bytes and the first 96-bits of the key, respectively. The program should print out on standard output the missing 4 bytes of the key in hexadecimal, the decrypted message and the time it took to find the correct key.o To test this part, here is the encrypted file (ciphertext2.dat), and the first 96-bits of the key (partial-key.dat) Hint: the original message starts with the word "Salam". Answer you provided .from Crypto.Cipher import AESdef revpad(s):"""This function is to remove padding.parameters:s:strstring to be reverse padded"""k = ord(s[-1])temp = 0 # temporary variable to check paddingfor i in range(1, k): # for loop to…
Give an illustration of a made-up scenario requiring the management of login credentials, for example. Determine a number of different approaches that may be used to verify identify. Is it possible that, at some point in the future, passphrases will take the place of passwords?
Explain the difference in file size between a symbolic link and the target file?
Consider the example of a program that allows for remote surgery. What's the point? Do they want to do harm? With what will they strike? Does it take an attacker to exploit a vulnerability?
Give a scenario in which one of the four different methods of access control may be used. If there are other options out there, why should I choose this one?
implements a very simple networked communications client and server. Messages are typed into the window at the server and written across the network to the client side, where they are displayed.
IN JAVA PROGRAMMING LANGUAGE PLEASE , DO THE ENCRYPTION AND DECRYPTION FOR THIS CIPHER BUT USING THIS SOLUTION IN THE IMAGE AND NOT THE ONES ON THE INTERNET PLEASE I WANT THE RESULT OF ENCRYPTION TO BE THE SAME AS THE IMAGE AND FOR THE DECRYPTION TO GIVE THE SAME ORIGINAL MESSAGE

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