In message <199907150218.WAA00540@pzero.sandelman.ottawa.on.ca>, Michael Richar
dson writes:

>
>    Perry> No, that's not correct in either case. rc2 was openly published by
>    Perry> them, rc4 is almost impossible for them to claim trade secret
>
>  Okay, rc2 remains as is.

rc2 is described in RFC 2268, which also notes that it's a registered trademark.