original: RC4 was initially a trade secret, but in September 1994 a description of it was anonymously posted to the Cypherpunks mailing list.
simplifications: RC4 was a trade secret. In September 1994 its description was anonymously posted to eh Cypherpunks mailing list. RC4 was a trade secret, but in 1994 it's description appeared on the Cypherpunks mailing list. An RC4 trade secret description was anonymously posted to the Cypherpunks list in September 1994. RC4 was initially a trade secret. In 1994, the Cypherpunks mailing list posted a description of it. RC4 was initially a trade secret. However, in September 1994, a description of it was anonymously posted to the Cypherpunks mailing list. RC4 was first a trade secret. In September 1994 a description of it was posted without a name to the Cypherpunks mailing list. Despite RC4 being an internal secret in 1994 a full description of it was placed on the Cypherpunks mailing list by an anonymous source. In September 1994, the RC4 trade secret was posted to the Cypherpunks mailing list. Initially, RC4 was a trade secret, but a description of it was anonymously placed on the Cypherpunks mailing list in September 1994. RC4 was at first a trade secret. But in September 1994 a description was posted to the Cypherpunks mailing list, without saying who had posted it.