erform encryption and decryption using the RSA algorithm for the letter "S". Show all steps in details when p=5 , q=7 , e=5.
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Perform encryption and decryption using the RSA
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- 6. In a Rivest, Shamir and Adleman (RSA) cryptosystem, a particular user uses two prime numbers P and Q to generate the public key and the private key. If P is 23 and Q is 29, using RSA algorithm, find the following: e) public key f) private key g) Encrypted data (Assume the original message, M=7) h) Decrypted dataThe ROT-13 algorithm encrypts a string one character at a time by adding 13 to the value of the internal representation of the character. We want our encryption scheme to cover the entire printable ASCII range. After examining the ASCII character set and their internal representations, we see that characters 0 through 32 and character 127 are control characters. Technically, characters 32 (space) and 127 (DEL) are printable, but we don’t want to include them in our encryption routine. Therefore, we want our encrypted string to only contain characters in the range of 33 through 126. As an example: Plaintext: Norwich Ciphertext: [|!&vpu The internal representation of ‘N’ is 78. 78 plus 13 is 91, which is the character ‘[‘. The internal representation of ‘o’ is 111. 111 plus 13 is 124, which is the character ‘|’. The internal representation of ‘r’ is 114. 114 plus 13 is 127. Since 126 is our maximum value for our desired printable range, we…A document was digitally signed by you and later you find out that two characters in one of the words must be switched. For example, the word letter was spelled as lettre. a) When you fix this mistake, do you have to sign it again? Why? b) Is there any limit on the size of the document that you sign? Why? c) How does the verification of digital signature work?
- 9. Cryptology is the science of making and breaking codes. This lab explores how the idea or functions and their inverses can be used to encode and decode messages. To encode and decode a message, first replace each letter of the alphabet with a positive integer using the following scheme, thus rewriting the original message as numbers instead of words: P- 16 Q- 17 R- 18 S- 19 T-20 Z-26 Blank - 27 A – 1 В - 2 С -3 D- 4 E- 5 F- 6 G- 7 H-8 |- 9 J- 10 K- 11 L-12 М -13 N- 14 O- 15 U- 21 V- 22 W-23 X-24 Y-25 ENCODING: A one-to-one function can be used to encode a numerical message. For example, suppose you want to send the message MATH to a friend, and you have decided that the function f(x) = 3x + 4 will be the encoding function, This function simply describes the procedure used to create the encoded message – in this case multiply by 3 and add 4. First change the letters to corresponding numbers as shown above: 13 1 20 8. Then use these as the input values in f(x). Tuoy Jud noltonut…Describe the algorithm used by your favourite ATM machine in dispensing cash. (You may give your description in either English or pseudocode, whichever you find more convenient.)1. Messages are to be encoded using the RSA method, and the primes chosen are p “ 13 and q “ 23, so that n “ pq “ 299. The encryption exponent is e “ 13. Thus, the public key is p299, 13q. (a) Use the repeated squaring algorithm to find the encrypted form c of the message m “ 84. (b) Show that the decryption exponent d (the private key) is 61. (c) Verify that you obtain the original message after decryption. Use the repeated squaring algorithm. Please no plagiarism and also i want clear had writting. Thanks.
- ***Please use the 16-bit input of F5C6 and NOT the 16-bit F0F0. I've been trying to figure this out for awhile and all explanations have used F0F0, not F5C6***Consider a simple system with 8-bit block size. Assume the encryption (and decryption) to be a simple XOR of the key with the input. In other words, to encrypt x with k we simply perform x⊕k giving y. Similarly, to decrypt y, we perform y⊕k giving x. You are given the following 16-bit input “F5C6” in hexadecimal. You are provided IV as “8C” in hexadecimal. The key to be used (where appropriate) is “49” in hexadecimal. Compute the encrypted output with the following methods. Express your final answer, for each of them, as 4 hexadecimal characters so it is easy to read. A. Using ECB B. Using CBC C. Using OFB D. Using CFBCryptography 1.) In A5/1, find the value of the following functions below. a. Majority (1, 0, 0) b. Majority (0, 1, 1) c. Majority (0, 0, 0) d. Majority (1, 1, 1) Note: In each case, show how many LFSRS are clocked. Also, solve to show how you got your answers.Alice wants to send Bob her account number for his dining dollars. Bob’s account number is 24. Bob wants to encrypt her account number using the RSA algorithm scheme as evil Eve wants to steal her money to buy M&Ms. Bob chooses two prime numbers, 23 and 37, and uses them to compute the number m. Bob then computes the number e and the number d by using things he knows about the number m and its relationship to e. Bob sends the number e and the number m to Alice and she uses them to encrypt her number A and obtains the number C. C is the encrypted version of her code. Alice sends the number C to Bob, and then Bob uses the number d to decrypt Alice’s message. Using this information, encrypt and decrypt the message to show that the RSA algorithm works, then in a few words explain what makes the algorithm secure if the key for encrypting is always public.
- Question: Explain and discuss Cryptarithmetic Problem with a real example. Note: There is no such thing as plagiarism. If there is plagiarism for any reason, then I will not accept that answer.c on Suppose you are working for a secret agency of Army and based on the secret information you are planning to attack on your enemy mean while you want to keep the plan very confidential so that nobody could know your plan for the same you encrypt the message "We have to fight", whereas the key is 3. Write all the steps as well for the encryption process of the message.a. Develop a Caesar cipher-type encryption algorithm with a little more complexity in it. For example, the algorithm could alternatively shift the cleartext letters positive and negative by the amount of the key value. Variations on this are limitless. b. Select a single-digit key. c. Code a short message using the algorithm and key. d. Give your instructor the algorithm, key, cleartext, and ciphertext. e. Optional: Your instructor will randomly redistribute to the class the ciphertext messages completed in part d above. You are to decode the message you receive as an additional assignment.