Substitution cipher

Security and integrity, as well as the privacy of user data, remain an important aspect of any computing-related business. Considering that all businesses have turned to technology in a bid to enhance efficiency, it is common to face security related issues. Cloud robotics which is one of the algorithmic processes is a good example of what can be attained using algorithms. This paper is bent on focusing on practical differences in which algorithms are used in solving problems (phishing) through…

Android’s latest version 5.0. Various cryptographic algorithms are used for encryption. It also uses hardware based storage for the key using Trusted Execution Environment (TEE) signing capability. It uses 128 bit AES as the encryption algorithm with Cipher Block Chaining and SHA256. In version 5.0, when the device is booted for the first time, a 128 bit master key is generated using which the data on the device is encrypted. This master key is then encrypted with the device password (a default…

Diploma in computing & networking (level 7) Assessment W1: Cryptography Prepared By: Karanjot Singh Deol Table of Contents 1 Task 1: Cryptography- their methods to do and how it used in IT environment: 1 Cryptography 1 Methods of doing cryptography: 2 Symmetric key Encryption 2 Asymmetric Keyencryption 3 How to secure our encrypted data: 4 Integrity: 4 Overview of cryptography: 6 Conclusion: 6 Task 2: Applications of…

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,…

extracting letters of the message exchanged. The warden is oblivious to the existence of a secret message. The medium mentioned in the problem above could be photographically produced microdots used by espionage agents during World War II, a Bacon cipher that uses different typefaces to hide information or a digitally altered JPEG image hide using Steg hide. In all the above-mentioned methods the priority is to hide messages in plain sight and make the carrier look…

2 DESCRIPTION OF THE USEA 2.1. Data Encryption phase USEA encrypts 512-bit blocks of plaintext to cipher text by a 256-bit main key that from now we call it MK. In default, USEA consists of 20 identical rounds, but we can increase or decrease the rounds for amplification of our algorithm in specific hardware or software implementation. Note that Decreasing rounds of algorithm reduces its security against attacks. USEA uses different algebratic, logic and arithmetic operations for data…

plain text, which is the text that someone will type in a form that is understandable to the human. This plain text will then undergo encryption, which is a technique that converts plain text into a form that is not understandable called cipher text. The cipher will then undergo transmission towards the receiving party. A particular encoding method forms the basis for choosing series of numbers or letters that thereafter form a key. This will form the basis for encryption and…