Because RC4 is a stream cipher, it is more malleable than common block ciphers. If not used together with a strong message authentication code (MAC), then encryption is vulnerable to a bit-flipping attack. The cipher is also vulnerable to a stream cipher attack if not implemented correctly.
because rc4 is a stream cipher it is more malleable than common block ciphers if not used together with a strong message authentication code (mac) then encryption is vulnerable to a bit-flipping attack the cipher is also vulnerable to a stream cipher attack if not implemented correctly