4: Signing a Message generate a signature for the following message (please directly sign this message, instead of signing its hash value): M = I owe you $2000. make a slight change to the message M, such as changing $2000 to $3000, and sign the modified message. Compare both signatures public key : n = DCBFFE3E51F62E09CE7032E2677A78946A849DC4CDDE3A4D0CB81629242FB1A5 private key : d = 74D806F9F3A62BAE331FFE3F0A68AFE35B3D2E4794148AACBC26AA381CD7D30D

4: Signing a Message generate a signature for the following message (please directly sign this message, instead of signing its hash value): M = I owe you $2000. make a slight change to the message M, such as changing $2000 to $3000, and sign the modified message. Compare both signatures public key : n = DCBFFE3E51F62E09CE7032E2677A78946A849DC4CDDE3A4D0CB81629242FB1A5 private key : d = 74D806F9F3A62BAE331FFE3F0A68AFE35B3D2E4794148AACBC26AA381CD7D30D

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Toy encryption scheme. It encrypts plaintexts that consist of only uppercase letters and the underscore character (27 characters total): ABCDEFGHIJKLMNOPQRSTUVWXYZ_ Note that the underscore character is part of the alphabet and will also be encrypted. A key in this scheme consists of 4 digits, each from 0 to 9. Each digit tells how much to shift one character, that is, change it to the character that many positions later in the alphabet. If the shift goes past '_', then we wrap around to the beginning. The key is applied separately to each group of 4 letters in the message. For example, if the message HI_SALLY is encrypted with the key 2407, the H would be shifted by 2, the I by 4, the underscore by 0, and the S by 7. Then we would start over with the first digit of the key, shifting A by 2, L by 4, and so on. So the ciphertext would be: JM_ZCPLE. Give the encryption of the following messages with the key 2641. a. SELL_GME b. FRANZ_IS_MOLE c. DEPLOY_ALL_DIVISIONS
Q2: Secret Courses Dan's recently announced that he's teaching n top-secret courses next semester. Instead of enrolling in them through ACORN, students need to email Dan to express their interests. These courses are numbered from 1 to n in some arbitrary order. In particular, if a student named s is interested in taking a course c, they need to send an email to Dan containing the message c s. Note that if a student is interested in taking multiple courses, they need to send multiple emails, one per course. Upon receiving a message c s, Dan looks at the list of students already enrolled in course c. If there's already a student on the list whose name is too similar to s, Dan assumes s is the same student and ignores the message. Otherwise, he enrolls s in the course. Dan considers two names too similar if and only if they have the same length and differ in at most one letter (note that "a" and "A" are considered the same letter). For example, "Josh" and "Josh" are too similar. "Sam" and…
Directions: Write security if the underlined word on the subsequent statementmakes it true and virus it makes the statement a false one, then write the correctterm/word to correct it.
Please Note: Send me only the correct answer. If you don't know the answer then leave it & forward it to others. Don't give me the wrong answer. I'll give an upvote if you give me the correct answer & send as soon as possible.
def is_strong-password(passwd: str) -> bool: """Return True if and only if passwd is considered to be a strong password. A string is considered to be a strong password when it satisfies each of the following conditions: it has a length greater than or equal to 6, it contains at least one lowercase letter, it contains at least one uppercase letter, and it contains at least one digit. - - Hint: Try using boolean variables or counting variables in your solution. They can be used when determining whether or not each condition has been met. >> is_strong_password('I> is_strong_password('compsci!!') False >> is_strong_password('Csc108') True II II II
Objective: Given a secret keys "mysecret" and "cs335cryptograph" for DES and AES methods respectively, perform encryption using both DES and AES. Lab: You will be given "DES.py" and "AES.py" programs. And these programs to fit to your solution. Also, you need to install "Cryptodomex" library (Please see the installation file for Cryptodomex) Tasks: In this lab, you will be encrypting messages using DES and AES python program. Submission: Please submit a lab report for following plaintext messages along with code and output snapshots: 1. Plaintext:" Welcome to CS 335" and Ciphertext: ? 2. Plaintext: "Computer Science and Mathematics" and Chipertext: ?
A Web site validates a 16-digit ID number based on the following rules - 1. Starting with the leftmost digit, double it and then double every other digit after it. However, if any of the doubled digits is a two-digit number, subtract 9 from it. Then sum these new digits. For instance, if the ID card number is 5866793610024475, then the digits considered are 5, 6, 7, 3, 1, 0, 4, 7, their new replacements are 1, 3, 5, 6, 2, 0, 8, 5 and the sum of the replacement is 30. 1 2 3 4 6. 7 8 9 10 11 12 13 14 15 8. 6. 7 9 3 6 1 4 4 7 5 6 7 1 4 7 5*2-9 6*2-9 7*2-9 3*2 1*2 0*2 4*2 7*2-9 =1 =3 =5 =6 =2 =0 =8 =5 2. Sum together the remaining sever digits from the ID card number. That is, the digits in the odd-numbered positions. With the ID card number above, we obtain 8+6+9+6+0+2+4+5 = 40. 3. Add together the two sums. If the result is a multiple of 10, then accept the ID card number. Otherwise, reject it. We accept the ID card number since 30+40=70, a multiple of 10. Write a program that perform…
8-1 Discussion: Cryptography V Available on Jun 18, 2022 11:59 PM. Submission restricted before availability starts. As you learned this week, RSA is the most widely used public key cryptosystem. In this discussion, you will apply RSA to post and read messages. For this reflection discussion, use the prime numbers p = 3 and q = 11. Using the public key e = 3, post a phrase about something that you found interesting or relevant in this course. Include only letters and spaces in your phrase. Represent the letters A through Z by using the numbers 01 through 26, and represent a space by the number 32. Treat upper case and lower case letters as the same. Optional: If you want to include punctuation characters, you can use the numbers 27 through 31 for that, but you must inform your classmates that you did. How did you calculate your value for d? As a check, the phrase "A CAB" would be represented by "01 32 03 01 02" and would be encrypted as "01 32 27 01 08".
Complete the following function according to its docstring. def check_password_exclusive(passwd: str) -> bool: """ An exclusive strong password has a length greater than or equal to 6, and contains ONLY letters and numbers. Return True if and only if passwd is considered an exclusive strong password. >>> check_password_exclusive('I<3csc108!') False >>> check_password_exclusive('time2sleep4me') True """
Consider the following WordNet senses of the word 'bank' bank!: Gloss: A financial Institution that accepts money and pays it out when required Example: He cashed a check at the bank bank?: Gloss: Sloping land (especially the slope beside a body of water) Example: He sat on the bank of the river and watched the currents Answer the following questions using Simplified Lesk Algorithm: Note: Use the following format for signature [word1, word2, .], use stem words (i.e accepts =accept, cashed = cash, and so on) a. Signature of bank': b. Signature of bank2: Consider the following test sentence: "On the edge of the river bank they came upon him" c. Signature of bank in test sentence: Using the Lesk Algorithm, how many overlaps with the two senses of the word bank: d. Number of overlap with bank': e. Number of overlap with bank?:
Could you help me with this one too, please Regex, APIs, BeautifulSoup: python import requests, refrom pprint import pprintfrom bs4 import BeautifulSoup complete the missing bodies of the functions below: def group_chat(text_message, friend):"""Question 2- Your friends are blowing up your group chat. Given a string of text messagesfrom your friends and a specific friend's name, return the first text messagethey sent, excluding their name.- Each text message ends with either a ?, !, or .- Your code must be written in one line. Args:text_message (astr)friend (astr)Returns:str of first match>>> text_message = "Madison: How are you guys going today?" + \"Anna: I'm doing pretty well!" + \"Madison: That's good to hear. How is everyone else?">>> friend = "Madison">>>group_chat(text_message, friend)How are you guys going today?"""pass test code: # text_message = "Madison: How are you guys going today?" + \# "Anna: I'm doing pretty well!" + \#…
Lab 02: Splitting a URL into pieces URLS are composed of five pieces: The scheme, also known as the protocol The authority (may further be divided into the user info, the host, and the port) The path The fragment identifier, also known as the section or ref The query string Read-only access to these parts of a URL is provided by nine public methods: getFile(), getHost(), getPort(), getProtocol(), getRef(), getQuery(), getPath(), getUserinfo(), and getAuthority(). Write a Java program which uses these methods to split URLS entered on the command line into their component parts.