NSA Change the World... http://www.nsa.gov/change/ Updates to NSA's Change the World... web site en-us Copyright 2012 http://www.nsa.gov/change/ Fri, 05 April 2013 14:00:00 EST Check Out This Online Competition for 6th through 12th graders! Want to register for an upcoming online cyber "hacking" competition? From 26 April through 6 May, you can experience and practice offensive and defensive computer skills! http://www.picoctf.com/ What are you doing on 17 March 2013? Girl Power event is on Sunday, March 17, 2013 from 2-5 p.m. Middle and High School Girls Exploring Careers in Science, Technology, Engineering and Mathematics (STEM) http://www.nsa.gov/change/_files/girl_power.pdf Substitution Ciphers: Do you have what it takes? You can use cryptography to add another layer of protection to your email messages! Learn how to communicate using monoalphabetic cipher and solve our email crypto challenge! http://www.nsa.gov/change/subciphers.shtml Change the World Word Search Complete the word search and solve the hidden message. http://www.nsa.gov/change/wordsearch.shtml Cyber Word Scramble Want to try your hand at finding some familiar computer terms in our word scramble? http://www.nsa.gov/change/wordscramble.shtml Download a Cipher Disk Print and construct your own cipher disk to create and translate messages. http://www.nsa.gov/change/cipherdisk.shtml Be a Password Protector Learn how to create a secure password. http://www.nsa.gov/change/index.shtml#passwordprotector Check out the Enigma The Enigma is an example of a mechanical implementation of a polyalphabetic substitution cipher. http://www.nsa.gov/change/subciphers.shtml#enigma