Suppose a password consists of 9 ASCII characters. You can review the ASCII characters here.. There are exactly 2" = 128 ASCII characters; we will assume every character in the password is ASCII (non-printing characters are allowed). What is the size of the keyspace that consists of passwords of this form? What is the equivalent key length in bits? Assuming that you could check one password every 10¬10 seconds, what is the worst case running time for cracking this password by brute force search (in days)? Now assume that the user used only 29 characters from the keyboard. What is the key length in bits in this case? How many days, in the worst case, would it take to break this weaker password? You can't round to the nearest day here -- be as exact as possible. Supposing you used only 29 characters, how long is the shortest password that achieves 177 bits of security?

Plot (as a function of angular frequency), the magnitude and the phase of the impedance resulting from a resistor (1.2 kOhm) and inductor (1.5 mH) in parallel. Use a logarithmic axis for the frequency, and for the magnitude. Use the range [10, 10**10] rad/s. The impedance of an inductance L is ???Ljω. Label axes. In python and can use cmath if needed

Imagine you have a spreadsheet with exactly one row of data—row 2—that has three cells with data in it. You want to copy that row to row 1. Describe how you would cut and paste row 2 to row 1 using only key commands (no mouse clicks or menu selections). For the arrows, up, down, left, and right are sufficient; for hotkey commands that require two keys pressed at once, use a + symbol between the keys (e.g., Shift + Z for undo). You start in cell A1.

Write a program to handle a user's rolodex entries. (A rolodex is a system with tagged cards each representing a contact. It would contain a name, address, and phone number. In this day and age, it would probably have an email address as well.) Typical operations people want to do to a rolodex entry are: 1) Add entry 2) Edit entry 3) Delete entry 4) Find entry 5) Print all entries 6) Quit You can decide what the maximum number of rolodex entries is and how long each part of an entry is (name, address, etc.). When they choose to edit an entry, give them the option of selecting from the current rolodex entries or returning to the main menu — don't force them to edit someone just because they chose that option. Similarly for deleting an entry. Also don't forget that when deleting an entry, you must move all following entries down to fill in the gap. If they want to add an entry and the rolodex is full, offer them the choice to return to the main menu or select a person to overwrite. When…

An early attempt to force users to use less predictable passwords involved computer supplied passwords. The passwords were eight characters long and were taken from the character set consisting of lowercase letters and digits. They were generated by a pseudo-random number generator with 2^15 possible starting values. Using the technology of the time, the time required to search through all character strings of length 8 from a 36-character alphabet was 112 years. Unfortunately, this is not a true reflection of the actual security of the system. Explain the problem

USING KEIL PLEASE.. Ciphers use many bitwise operations for cryptography. Write an ARM assembly program to use ciphers. See the steps below to implement the cipher. In this program, you will implement a "Symmetric Encryption".    Create three variables, Plaintext, Key, and Cipher (5 Points) For encryption, design a key value, assign the last nonzero number of your student ID (#900 number) in a variable called “Key” (5 Points) For example: if your 900 number is 90012450. Assign 5 to the variable Key and use it as the Key for encryption. Use this link for the Links to an external site.video to understand Symmetric Key Cryptography and implement that for encryption and decryption.  For the variable Plaintext, assign any four-letter word. Encrypt the plaintext using the value in Key and store the encrypted text in the variable Cipher.  Test the encryption by decrypting and storing the decrypted text into register R5. Provide comments to each statement