2) Encode the letters 'A' to 'Z' as the numbers 10 to 35, respec- tively. Taking p = 47, q = 83, use the Rabin cryptosystem to encode the message consisting of the first two letters of your family name (in the unlikely event that your name only has on letter, add a second letter). Note that the two letters yield a single, 4-digit block for encryption, not two 2-digit blocks. Decrypt the encrypted message. As part of your solution present in full all computations, including both encoding and decoding.
Q: Encrypt : QuiZ Cresar cypher is OVER using the with $ (p) = p+18 (mod 2b Let AこO, B=, Z=25
A: Given plain text is QUIZ IS OVER Also given f(p) = p+18(mod 26) So, key is 18
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- The following figure is the Cipher Block Chaining (CBC) mode to encrypt large messages. Which of the followings statement is *correct* regarding this mode? IV m₁ m₂ m3 C3 m4 C4 m5 C5 If a message contains two identical 64-bit blocks, the corresponding ciphertext blocks are also identical. Switching the order of two cipher blocks will not cause any detectable error in the plaintext. Duplicating a cipher block will not cause any detectable error in the plaintext. Deleting a cipher block will cause some detectable error in the plaintext. m6 E encrypt with secret key C6Question: Using the simplified RC4 Algorithm of 8 bytes (rather than the full 256 bytes), find the final Keystream and Cipherpext of the following Input string: S-Array of length 8, [S0 S1 S2 S3 S4 S5 S6 S7] = [7 6 5 4 3 2 1 0] Key, K = [3 1 4 1 5] Plaintext, PT = [6 1 5 4] Hint: For the simplified stream generation, you can use this pseudocode (only up to the PT length): /* Initialization */ set i and j = 0 for i = i + 1 to length of PT j = j + S[i] mod 8 swap S[i], S[j] t = S[i] + S[j] mod 8 Keystream = S[t] end forPlease answer both questions, exactly with explanation: # A password generator creates a 10-character case-sensitive alphanumeric (a-zA-Z0-9) password keyed by pseudo-random number generator that has deterministic output based on a 32-bit seed (e.g., a 32-bit integer) provided by the user. How many passwords are possible? If it takes .0001 seconds to check a password, what will the average length of time be for a successful brute force attack?
- I believe that I am limiting my scope of knowledge in gathering information through the media. The media has a limited perspective. What information are you not seeing in the media that you follow? How could you make sure that your perception is not shaped by limiting information?A.Given p=25, q=9, and e=7, generate the public key (n,e) and the private key (n,d) using the RSA Key generation algorithm. (Use Excel for computations) b. Given Bob's public key of (85, 7) and private key of (85, 55), show how Alice can encrypt m=3 to send to Bob. Show the ciphertext. c. Given Bob's public key of (85, 7) and private key of (85, 55), show how Bob can decrypt the ciphertext y=2 received from Alice. Show the plaintext. d. Using the fast exponentiation method, determine 530 mod 47. Show your work.. Using the RSA public key cryptosystem, with a = 1, b = 2, etc., a. If p = 7 and q = 11, list five legal values for d. b. If p = 13, q = 31, and d = 7, find e. c. Using p = 5, q= 11, and d = 27, find e and encrypt "abcdefahii".
- Plz don't use chat gpt] In the following problems, check suitable rule (Sum, Subtraction or Product) and compute the total number of possible ways in the entire procedure: The password for a computer account can be 6, 7 or 8 characters in length; the characters can be letters or digits. What is the number of ways a password can be formed? How many bit strings of length sixteen start with a 11 or end with 00?write an encoder and a decoder for a modified "book cipher." A book cipher uses a document or book as the cipher key, and the cipher itself uses numbers that reference the words within the text. For example, one of the Beale ciphers used an edition of The Declaration of Independence as the cipher key. The cipher you will write will use a pair of numbers corresponding to each letter in the text. The first number denotes the position of a word in the key text (starting at 0), and the second number denotes the position of the letter in the word (also starting at 0). For instance, given the following key text (the numbers correspond to the index of the first word in the line) [0] 'Twas brillig, and the slithy toves Did gyre and gimble in the wabe; [13] All mimsy were the borogoves, And the mome raths outgrabe. [23] "Beware the Jabberwock, my son! The jaws that bite, the claws that catch! [36] Beware the Jubjub bird, and shun The frumious Bandersnatch!" [45] He took his vorpal sword in…
- 21. RSA problem: given plaintext P, e, prime numbers p, q, compute ciphertext C. Decrypt C and verify you get plaintext P back.(1) Find a quote that you like. Make sure that the total number of characters is at least 50 and no more than 100. (2) Then pick a number that is between 4 and 24 as your additive key. (3) Create a table of correspondence of 26 alphabets in plaintext and the ciphertext. (4) Use the table of correspondence to encode the quote you found in Part (1). Post the encrypted message:For example, here is a quote from John DeweyFailure is instructive. The person who really thinks learns quite as much from his failures as from his successes.We will use additive key 17. The table of correspondence between plaintext and ciphertext is as follows.(attached) Thus the encrypted message isWRZ CLI VZJ ZEJ KIL TKZ MVK YVG VIJ FEN YFI VRC CPK YZE BJC VRI EJHLZK VRJ DLT YWI FDY ZJW RZC LIV JRJ WIF DYZ JJL TTV JJV J(5) Pick an encrypted message from your classmate and try to decrypt it. Remember to use the frequency table because you will not have access to the additive key. Make sure to include all…PART 1 1. Using python, create a program with a function of enc_text(text, key) to encrypt the variable text using the provided key (executing a modified version of Ceasar Cipher). Follow these rules: а. The key will contain a word made up of the letters 'a' and 'b'. The cipher will use the key to know the direction of the shift: • 'a' - the character must be shifted upwards • 'b' - the character is to be shifted downward. b. The number of characters in the key will determine the number of positions to shift. c. The given text variable will only have characters from the ASCII table (values between 32 and 126). d. If the key is invalid (contains characters other than a and b or an empty string) or the text is invalid (empty string), no encryption will happen and the function returns the original text. e. The key will loop through again to accommodate the additional text characters if the text has more characters than the key. Brute force solutions will not be accepted and an iterative…