Description: This final RC4 Basics video will discuss File encryption / decryption using RC4. The RC4 algorithm is symmetric ( the encryption and decryption keys are the same ) and thus we can encrypt a file using a secret key and the receiver of the file will decrypt it using the same key. This works because ( A xor B ) xor A = B . What this means is if the same keystream is Xor'ed with the plain text twice, then the text remains unaltered. Thus this provides a way for decrypting the cipher text very easily. In this video we will look at a simple Rc4 file encryptor which takes a key as input and encrypts the file. Links:<br><br>1. RC4 Basics on Wikipedia<br><br>2. RSA Basics from RSA Labs<br><br>
Tags: basics ,
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