Block cipher

The Counterfeit Coins Problem is a well-known complex search problem in mathematics as well as in computer science. It can be related to the data structure (such as binary tree) computer program, algorithm, Graph Theory, Therefore researching this problem is meaningful. The Counterfeit Coins problem can be described as given a set of n look-alike Coins containing One Counterfeit which is a bit heavier or lighter than the genuine Coins. The objective is to find the Counterfeit Coins in minimum…

War II, Germans were communicating through this enigma. They talked about who was their next target and highly classified things that they didn’t want their enemies to know. Alan was able to crack the code, which was extremely difficult since the cipher system was changed every day. Alan Turing and his knowledge of computer science affected millions and saved countless lives. If it wasn’t for him for cracking the German Enigma Code, the war would’ve gone on for a couple of more years.…

RQ 1 A function for one block of bits in a hash function is referred to as a compression function. RQ 2 The main arithmetic and logical functions in SHA algorithms include AND, OR, NOT, XOR and the circular shift. RQ 3 The requirement in the replacement of a hash function is to remove the existing hash function and the insertion of the desired function. RQ 4 A one-way function is an algorithm or a function that is used to turn a piece of text into a fixed string of digits and is nearly…

A and B and C), he can create a trapdoor in arbitrary order as one search token, that’s mean he can send one of the following combined keywords (A∥B∥C), (A∥C∥B), (B∥A∥C), (B∥C∥A), (C∥A∥B) or (C∥B∥A) as a query to the remote server. Then the server tests the Bloom filter against the trapdoor and retrieves the associated matched document to DU without needing for the posting list intersection protocol. Our scheme consists of six algorithms KeyGenerator, BuildIndex, DocEncrypt, Trap- doorGen,…

the floor and picks up a small wood block. He moves his block on the tracks that other boys already built together with long wood blocks. He stands up and walks to the container and pick up more blocks. He puts the block on the track and moves it like a toy car. When he sees another block on the way, he says, "I can't move." and crashes it with his block. His block and a few blocks are out of the track and some of them fall on his leg. He starts to build blocks again and puts one big one to…

Cryptography began as soon as language and writing were developed, some early forms were the use of hieroglyphics, or the use of secret messages on animal skins to tell stories or to pass along messages. These more primitive methods lead to the Cipher (or Caesar) disk where there were two rings of the alphabet and the inner ring could be moved around within the circle in order to give each outer alphabet characters a new corresponding letter (Ellison). This process was known as transposition,…

The city of Mannheim in Germany was one of the greatest industrial hubs of the time: creativity and innovation was at its peak. Because of this, it became an important city for both World War I and World War II. However, it had become a main target for the opposition, the Allied forces and in December of 1940, air raids began raining down on the city. This lasted until the war ended, leaving the city pretty much in ruins. During the long process of reconstructing the city, a contest was held to…

Hexagonal urban planning blocks are either directly on streets or are placed on the shortest course of a main street. Thus, allowing easy access to city blocks and integration to secondary uses of the area. For example, zoning and keeping houses away from city buildings, but still using streets as the connecting path to the two functions. Also, this idea of hexagonal blocks does not need to be symmetrical, it can also be reproduced in organic irregular…

to get further along. These mental blocks can be your brain’s way of telling you to take a rest. So, to overcome mental blocks, start by hitting the reset button. Then, after you feel refreshed, tackle the problem in a different way. It may also help to implement a few changes to your environment to get your creative juices flowing. ==Steps== ===Resetting Your Mind=== #Go outside. Nature offers a wonderful outlet to beat stress that may arise from a mental block. Plus, a bit of time outdoors…

their educational experience. A student’s day consists him/her going to class and listening to a teacher for minutes on end. Two types of schedules, modular and block, have become controversial in the world of education. According to Marla M. Mondie, in her article titled, “Teaching on the Block: A Model for Pre-Service Teachers”, “Block schedule is rooted in J. Lloyd Trump’s 1959 Flexible Modular Scheduling Design” (Mondie 3). The plan originally called for class to have a 40 minute lecture, 20…