By Israel Torres, a hacker at large with interests in the hacking realm and an author of crypto challenge: http://hakin9.israeltorres.org
In this third installment of CryptoTutorials we will introduce the concept of using a pseudo-random key system as an encryption mechanism. Included is a basic exercise that uses the C programming language (and source file) to demonstrate how to encrypt and decrypt an arbitrary string with a key. Only with the key will the message be successfully decrypted in a timely fashion (ala poor manŐs one-time pad OTP).
What you will learn…
crypto fundamentals, how to use a key to encrypt your communications
What you should know…
basic C programming for programmatic implementation
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