What is a reverse shell?

A "poison packet attack" is when someone throws a bunch of poison at someone. There are two examples of this kind of attack that you can give.

Can an attacker using a MAC modify the Tag (the MAC) and the encrypted data? This attack is hopeless since the recipient can always identify whether the Tag/ciphertext has been tampered with.

The client wants to be able to upgrade an employee’s security level, so as the employee receives apromotion they can access new areas.An employee may upgrade another employee’s security level only if the upgrader (the employee upgradinganother employee) has a security level at least one security level above the upgradee (the employee beingupgraded). That way an employee with a security level of 2 can upgrade an employee with a security levelof 1 to a security level of 2, but is not able to upgrade an employee of security level 2 to a security level of3. In the case where the employee does not have the correct security level to upgrade another employee,security should be alerted with the names of both of the employees.As a junior engineer I was unsure how to achieve this, but I have started a flowchart. Could you pleasefinish the flowchart, using appropriate tools that will create presentable flowcharts, so that I can implementthis within a programming language.

Add the answer to the parts that say #TODO ..... . this is in yaml!

Can an attacker using a MAC modify the Tag (the MAC) and the encrypted data? This attack is hopeless since the recipient can always identify whether the Tag/ciphertext has been tampered with.

Decrypt ciphertext (kx mod p = 7, ge mod p = 8). The ciphertext was created using Elgamal encryption over group Z*p with your public key (p=13, g=2, gd mod p=12) and your private key is d=6. What is the shared k value?_________ What is k-1 mod p?___________ What is the plaintext x?_________ Type each of your answers as an integer.

Consider the following sequence of commands and messages: $ git clone git:cisc210/example Cloning into 'example'... remote: Counting objects: 19, done. remote: Compressing objects: 100 % (12/12), done. remote: Total 19 (delta 1), reused 0 (delta 0) Receiving objects: 100 % (19/19), done. Resolving deltas: 100 % (1/1), done. $ touch sky $ git add sky fatal: not a git repository (or any parent up to mount point /) Stopping at filesystem boundary (GIT_DISCOVERY_ACROSS_FILESYSTEM not set). Enter two commands that would make it so the 'git add' wouldn't fail. Note: don't actually execute the "git add" command, just two commands that would let it work. Feel free to try it out on cisc210.cis.udel.edu!

Why would the creator of a virus with a system corruption payload have the infection do irreversible harm to a system? Let's say the virus encrypts the target's hard drive using a technique whose decryption key is known to the attacker.

For the following dataframe (df): Y 1 NaN 1 2 NaN NaN 3 What will be the output for the following command? df['z'].isna() False 1 False 2 False Name: z, dtype: bool X 2 y 1 z 3 X True y True False dtype: bool Syntax Error