RC4 Cryptosystem in javascript
RC4 is a fast stream cipher invented in 1987 by Ron Rivest. If you like details, you can see this http://en.wikipedia.org/wiki/RC4
RC4 has become an extremely popular ciphersuite for SSL/TLS connections. There are essentially two reasons for this: 1)RC4 does not require padding or IVs, which means it's immune to recent TLS attacks like BEAST and Lucky13. Many admins have recommended it as the solution to these threats. 2)RC4 is pretty fast. Faster encryption means less computation and therefore lower hardware requirements for big service providers like Google.
-RC4.encrypt(key, str) - demonstrate the RC4 encryption script
-RC4.decrypt(key, res) - decode encrypted result with the same key
-RC4.keyStream(key, str) - generate keystream for a random array
-RC4.randomKey(len, msg, charSet) - generate a random key
-RC4.generateKeys(len, keyLength, message) - create an array with random keys
Last method from the algorithm is showing the weaknesses in the key scheduling
Demo Link: RC4