-There are a number of ciphers available to a TLS connection, and one of those is the [RC4](https://en.wikipedia.org/wiki/RC4) (Also known as ARC4 or ARCFOUR). RC4 was a popular cipher due to being a fast cipher which was not vulnerable to the [BEAST](https://community.qualys.com/blogs/securitylabs/2011/10/17/mitigating-the-beast-attack-on-tls) attack. However, in 2013 it was announced that [RC4 had a serious flaw](http://www.isg.rhul.ac.uk/tls/) that would make it possible for a determined attacker to decrypt data encrypted with RC4 in TLS.
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