Q2. RSA Alice starts the RSA, with key generation. She selects p-19 but she is confused with the second choice. Should she choose 17 or 21 for q? Q2.7 Bob wants to encrypt M= 22. Help him Show your work: Q2.Alice decrypts C= . Help her Show your work:
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- You may use a software to do calculations but you have to write down the details. The correspondence of letters table: A B C D E F GH I J K L M 01 02 03 04 05 06 07 08 09 10 11 12 13 N O P Q 14 15 16 R S TU V W X Y Z space 17 18 19 20 21 22 23 24 25 26 00 6. Implement the RSA cryptosystem with a sofeware of your choice. (Specifica- tion: Find two probable primes p 3p/2. Submit the primes p and q. I will encode a message with a key e and return the encrypted message and the key e to you. Then you will be asked to decode the message.)Encrypt Caesar cipher is a kind of substitution cipher. Instead of using a substitution table, the alphabets are rotated by a number (a key). For example, if the key is 3, plaintext alphabet a would become d, and plaintext alphabet z would become c. Write a program that implements the Caesar Cipher. You program will first prompt for the key and then for the mode (E for encryption and D for decryption) and finally for the message to be encrypted / decrypted. Your program will then output the encryption / decryption message. For this question, the input message may consists of any character, the program should encrypt or small letter case a to z only. All other characters should be kept intact after encryption or decryption.Q7: Using the same notations as in the lecture, e.g., p and q are the two primes and e and d are the public key and private key, respectively, p = 5, q = 13 and e= 5. Using the phi(n) that you found in question 6 and the Extended Euclidean algorithm yields d = 29. What is the cipher text C when encrypting M = 17?
- The Reflection algorithm can be used to encrypt a C-string (character array terminated with the null character) before it is transmitted over the Internet. The Reflection algorithm works as follows: Each letter in the message is converted to the letter in that is 13 positions to the right of that letter in the English alphabet. If the end of the alphabet is reached, counting continues from the first letter in the alphabet. The case of the letters must be maintained. For example,'M' →'Z', 'x' → 'k', 'A' → 'N'The numeric characters ('0' to '9') are shifted 5 positions to the right of that number in the character set '0' to '9'. If ‘9’ is reached, counting continues from ‘0’. For example,'0' → '5', '2' →'7', '8' → '3' All other characters are left as they are. a) What would the following string be encrypted to by the Reflection algorithm?“Call me at 662-2002 Ext 85393” b) Write a function, getPosition, which finds the position of a letter in the alphabet regardless of the case of the…kindly do it ASAP Write a code to implement the combination of RSA and AES algorithms. In your implementation, first the RSA will be used to encrypt the secret key for sending from Alice to Bob. On the other hand, the AES will be used for encryption and decryption of long messages between the Alice and Bob. Remember in such type of combination, first the Bob will generate its public and private keys and share its public key with the Alice. The Alice encrypt the short message (secret key for communicating the long messages) using RSA and send it to the Bob. Then Bob decrypts the short message (secret key for communicating the long messages) using its private key and found the short message (secret key for communicating long messages). After that both Alice and Bob use this same secret key for the encryption and decryption of long messages.A simple and very old method of sending secret messages is the substitution cipher. You might have used this cipher with your friends when you were a kid. Basically, each letter of the alphabet gets replaced by another letter of the alphabet. For example, every 'a' get replaced with an 'X', and every 'b' gets replaced with a 'Z', etc. Write a program thats ask a user to enter a secret message. Encrypt this message using the substitution cipher and display the encrypted message. Then decryped the encrypted message back to the original message. You may use the 2 strings below for your subsitition. For example, to encrypt you can replace the character at position n in alphabet with the character at position n in key. To decrypt you can replace the character at position n in key with the character at position n in alphabet. Have fun! And make the cipher stronger if you wish! Currently the cipher only substitutes letters - you could easily add digits, puncuation, whitespace and so forth.…
- Python The Dan Cipher works like this: shift the first lowercase character to the right by 1, the second lowercase character to the right by 2, and so on. Characters that are not lowercase characters are not changed. Write a program that takes a string and prints the result of applying the Dan Cipher.Substitution ciphers are encryption/decryption algorithms that replace one letter or number with another. The first attested use of a substitution cipher in military affairs was by Julius Caesar, described by him in Gallic Wars (cf. Kahn pp83-84). In caesar cipher , you replace each letter by 3rd letter on. If it is out of bound (later than Z), then round to the head (letter A) and continue the shift. For example:meet me after the toga party PHHW PH DIWHU WKH WRJD SDUWB Please write a program in Java to implement the Caesar Cipher: a. Implement the encryption algorithm. Ask the user to input one all lower case normal sentence (called plaintext) using the nextLine method, and then output the encrypted text (called ciphertext). b. Implement the decryption algorithm. Ask the user to input one encrypted sentence (i.e. ciphertext) using the nextLine method, and then output the decrypted text (i.e. plaintext).example: use the above key, if the letter "a" appeared in the message, it would be replaced with "g" since "g" in the adjacent letter. Return the encrypted message. Examples encrypt("ab c", "abc ab") → "ba cba" encrypt("otorhinolaryngological", "My name is Paul") "Mr olme
- Encrypt the message 001100001010 using Simplified DES (as defined in the book in section 4.2) and key 111000101. [Hint: After one round, the output is 001010010011.] If you do this by hand, it is sufficient to only do 3 rounds instead of 8 rounds. If you write a program, you should carry out the full implementation. Please provide your code.This is a substitution cypherEach letter is replaced by another letter with no repetitionIgnore spaces and punctuationYou must account for spaces (I ignored them, but there are other legitimate responses.)The best program will also account for punctuation and other symbols. (Ignoring them is fine.) Your program can ignore these special characters when they occur, but it should not crash if it encounters a strange character.Manage CapitalizationIn most cryptographic applications, all letters are converted to uppercase. Please follow this convention or deal with potential case conversion problems in another way.Use FunctionsYou may not make significant changes to the main function. Determine which functions are necessary and create them. (The blackbelt project does allow for one slight modification, noted below.) Do not turn in a program with only a main() function!! Write the code necessary for Python to run the main function as expectedPass data between functionsYour functions may…Implement the first round of AES ( Advanced Encryption Standard ) in python. Given a message with 128 bits, two subkeys subkey0 and subkey1, your program should be able to perform one AddKey before Round 1 and the corresponding operations (SubBytes, ShiftRows, Mix-Columns, and AddKey) in Round 1, and output the result of the encryption after Round 1.