In cryptography, the Fluhrer, Mantin and Shamir attack is a particular stream cipher attack, a dedicated form of cryptanalysis for attacking the widely-used stream cipher RC4. The attack allows an attacker to recover the key in an RC4 encrypted stream from a large number of messages in that stream. The Fluhrer, Mantin and Shamir attack applies to specific key derivation methods, but does not apply to RC4-based SSL (TLS), since SSL generates the encryption keys it uses for RC4 by hashing, meaning that different SSL sessions have unrelated keys.
From here. Does it mean that RC4 is not so secure as we want? And which stream cipher can we replace the RC4 in the SSL?