Belgian security researchers have developed a more practical and feasible attack technique against the RC4 cryptographic algorithm that is still widely used to encrypt communications on the Internet. RC4 (Rivest Cipher 4) is still the most widely used cryptographic cipher implemented in many popular protocols, including:SSL (Secure Socket Layer) (TLS) (WEP) (WPA) and Microsoft’s RDP (Remote Desktop Protocol) The new attack against WPA-TKIP requires just an hour to execute, allowing an attacker to inject and decrypt arbitrary packets.
Source: https://thehackernews.com/2015/07/crack-rc4-encryption.html