Cryptography When I wrote my first book, Fermat’s Last Theorem, I made a passing reference to the mathematics of cryptography. Although I did not know it at the time, this was the start of a major interest in the history and science of codes and code breaking, which has resulted in a 400-page book on the subject, an adaptation of the book for teenagers, a 5-part TV series, numerous talks and lectures, the purchase of an Enigma cipher machine and the development of an interactive crypto CD-ROM. In the Crypto Corner, you will find details about my book on cryptography (The Code Book), information about my TV series based on the book (The Science of Secrecy) and you can explore the Black Chamber, which is an interactive encryption and codebreaking section. You will also find a section about the Cipher Challenge, there are some cryptograms (coded messages) for you to try and crack, a free downloadable CD-ROM version of The Code Book, and a quick Q&A based on the questions I am most often asked.
Sharky's Vigenere Cipher This page is for amusement only. Instructions are given below this form. instructions: Enter the string to encrypt or decrypt in the Input field (you may copy and paste it from another text editor). Enter the key in the Key field. Sudoko Solver in Excel Solve Sudoku with Excel We are a little slow here in the midwest. The Akron Beacon Journal just recently started publishing a daily Sudoku puzzle in our comic strip pages. Wow! Talk about a time waster! I nearly became addicted to solving these puzzles. Convert hexadecimal to text Convert text into hexadecimal format. Computers store text as numbers, and with hex you display the numbers not as a decimal number, but in base 16. Hex or base 16 or hexadecimal is a numeral system that uses 16 symbols. The symbols include 0-9 and a-f (sometimes A-F). An example of a hexadecimal number is 3BF2. Computer science applications can use hexadecimal for binary coding in computing and digital electronics.
Online Shakespeare Course: Shakespeare After All with Harvard Faculty Marjorie Garber, PhD, William R. Kenan Jr. Professor of English and American Literature and Language and of Visual and Environmental Studies, Harvard University This free online Shakespeare course focuses on Shakespeare’s later plays beginning with Measure for Measure and ending with The Tempest.
Playfair Cipher The Playfair cipher encrypts pairs of letters (digraphs), instead of single letters. This is significantly harder to break since the frequency analysis used for simple substitution ciphers is considerably more difficult. Memorization of the keyword and 4 simple rules is all that is required to create the 5 by 5 table and use the cipher. The Playfair cipher uses a 5 by 5 table containing a key word or phrase. Polyalphabetic Substitution Ciphers Introduction The monoalphabetic (simple) substitution cipher uses only one replacement scheme for all letters of the plain text. Polyalphabetic ciphers use more than one replacement scheme. The Vigenere Cipher Given a letter of the plain text and one letter of the key word, the following table is used for encryption: The letter of the key word is located in the first row and the plain text letter is located in the first column.
Adyghe – ISO 9 transliteration system Adyghe – ISO 9 transliteration system Adyghe virtual keyboard The Adyghe virtual keyboard allows you to enter characters with a click of your mouse. There’s no need to change your keyboard layout anymore. The transliteration of each supported character is displayed on the right side of the character. AudioScore Ultimate Demo Download Download and read the AudioScore Quick Start Guide (File size 0.2 MB).Important: Due to the complex nature of polyphonic music recognition, it is often necessary to tell AudioScore which notes belong to which instruments (or remove any spurious notes if a single instrument) and also where barlines should go - page 5 of this short guide explains how to do this.Download and run the AudioScore Ultimate 7 Demo Installer (File size 8.6 MB) This download is similar to the full version except that the maximum track length is 20 seconds, saving is disabled and MP3 opening is restricted after 30 days. Click here for system requirements. This download is similar to the full version except that the maximum track length is 20 seconds, saving is disabled, and MP3 opening is restricted after 30 days.
Bind your own books In today's creative environment, where promotional material is routinely sent in the form of a digital file via email, a handmade self-promotional book can make a cost-effective, personal and unique alternative to help you stand out. In this tutorial, I'll explain how to bind a book in a few easy steps. We'll cover some important tips for setting up page spreads and cover templates in Adobe's InDesign, as well as the essential tools and techniques you need to bind your own books. If you need any bookbinding materials, a good source is Shepherds Falkiners. You'll also find an illustrated diagram of the sewing technique we used to make this project in the support files, to aid you as you go.
Download Enigma Simulator This software is an exact simulation of the 3-rotor Wehrmacht (Heer and Luftwaffe) Enigma, the 3-rotor Kriegsmarine M3, also called Funkschlussel M, and the famous 4-rotor Kriegmarine M4 Enigma cipher machine, used during World War II from 1939 until 1945. The sim has a very authentic feeling with its hands-on approach: you can select between the three models, actually lift out and insert different rotors, adjust their ring setting and set up the plugboard. The internal wiring of all rotors is identical to those that were used by the Wehrmacht and Kriegsmarine.
Trifid Cipher The Trifid Cipher is the Bifid Cipher taken to one more dimension. Instead of using a 5x5 Polybius Square, you use a 3x3x3 cube. Otherwise everything else remains the same. As with the Bifid Cipher, the cube can be mixed to add an extra layer of protection, but for these examples we not be using a mixed alphabet cube. The first step is to use the cube to convert the letters into numbers. We will be writing the numbers vertically below the message in the order of Layer, Column, Row.
Freeware Hex Editor XVI32 [Overview] [Features] [What's New] [Screenshots] [User Reviews] [Download] [Installation] [Other Freeware] [Home] Overview XVI32 is a freeware hex editor running under Windows 9x/NT/2000/XP/Vista/7. The name XVI32 is derived from XVI, the roman notation for the number 16. XVI32 and all of its components are developed by myself. The current release 2.55 is available since June 26, 2012.