Original: Plaintext Ciphertext Key Plaintext BBF316E8D940AF0AD3 Wiki pedia 1021BF0420 Secret Attack at dawn 45A01F645FC35B383552544B9BF5 Security RC4 falls short of the standards set by cryptographers for a secure cipher in several ways, and thus is not recommended for use in new applications.
Simplified: RC4 fails the standards set by cryptographers for a secure cipher in many ways, and is not recommended for use in new applications as there are a lot of methods of attacking RC4.