An attacker may decrypt the ciphertext (message authentication code) by altering the tag or the MAC. Do you foresee any possible issues with this strategy? The victim may be able to read a ciphertext that has been modified from the original Tag if this attack is successful

An attacker may decrypt the ciphertext (message authentication code) by altering the tag or the MAC. Do you foresee any possible issues with this strategy? The victim may be able to read a ciphertext that has been modified from the original Tag if this attack is successful

LINUX+ AND LPIC-1 GDE.TO LINUX CERTIF.

5th Edition

ISBN:9781337569798

Author:ECKERT

Publisher:ECKERT

Chapter12: Network Configuration

Section: Chapter Questions

Problem 10RQ

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Network Security

The word "network security" refers to a wide range of technology, devices, and processes. In its most basic form, it is a combination of rules and configurations that use both hardware and software technologies to safeguard the confidentiality, integrity, and accessibility of computer networks and data. Every company, regardless of sector, size or infrastructure, needs network security solutions to protect itself from the ever-increasing landscape of cyber threats that exist today.

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Changing either the tag or the MAC will allow an adversary to decode the ciphertext (message authentication code). Can you see any potential problems with this plan? If this attack is effective, the target may be able to decipher a ciphertext that has been altered from the original Tag.
An attacker may decrypt the ciphertext (message authentication code) by changing the tag or the MAC. Can you identify any issues with this plan? If this attack is successful, the victim may be able to decrypt a modified ciphertext from the original Tag.
Is it feasible to tamper with a MAC (message authentication code) and change the Tag and ciphertext while they are in transit? If you want to understand why this attack fails, consider the fact that the recipient can always tell when the Tag or ciphertext has been altered.
What happens if a potential attacker tries to alter the Tag (the MAC) and the ciphertext while they are in transit, using a MAC (message authentication code)? Please elaborate on why this attack is pointless given that the receiver will detect a modified Tag/ciphertext.
Is it possible for a threat actor to change both the encrypted data and the tag, which contains the MAC? Because the receiver can always determine if the Tag or ciphertext has been tampered with, this attack is fruitless.
When a message authentication code (MAC) is employed, what happens if an attacker tries to tamper with the Tag (the MAC) and the ciphertext? Explain why such an attack could never succeed, for example because the target could notice a difference in the tag or ciphertext.
What happens if a hacker tries to change the Tag (the MAC) and the ciphertext when the message authentication code is being used? Describe why this attack will always be unsuccessful since the recipient would be able to recognize a modified Tag or ciphertext.
For attacks that use MACs, the Tag (the MAC) and the ciphertext are both targets (message authentication code). In what ways could I possibly regret doing this? Even if the attacker is successful in changing the Tag or ciphertext, the target will always be able to tell the difference.
The adversary manipulates the Tag (the encrypted message) by means of the MAC (message authentication code). What exactly are the results that might occur? If this attack is successful, the victim will be able to immediately recognize any ciphertext or Tag that has been tampered with.
What happens if an attacker attempts to alter the Tag (the MAC) and ciphertext while the message is in transit? What transpires? Let us know how and why this attack will fail; that is, how and why this receiver will always be aware that the tag has been changed.
If an attacker changes the Tag (MAC) and ciphertext while using a message authentication code (MAC), what happens? Explain why this attack will fail as the recipient would recognize a changed tag or ciphertext?
What happens if an attacker attempts to alter the Tag (the MAC) and the ciphertext when a message authentication code (MAC) is being used? Describe why a successful attack like this would never be possible since the recipient might detect a changed tag or ciphertext.