: Not true. The problem is copyright, which is honored by Berne Convention : signers even if they don't have software patents or patent-after-publishing : rules like the US. This includes Europe, the U.S., and many other places. : ViaCrypt 2.4 is copyrighted by ViaCrypt, and RSAREF is copyrighted by RSA, : so you won't be able to use 2.5 source outside the US either; not sure about : binaries. : There's an easy cure for this, though - if some non-North-American wants to : write an RSAREF-compatible software package in C and distribute it as freeware, : then it can be used in non-US versions of things that require RSAREF. You misunderstand what the RSAREF stuff does - it isn't an alternative encryption - it's being used to replace the extended precision etc stuff in pgp to make a 100% compatible version. So the current pgp *is* already 100% compatible, as long as its version number is >= 2.4 (which by an amazing coincidence mines happens to be since I've had to edit a couple of mission-critical comments since I got 2.3a ;-) ) Even if 2.5 checks version numbers or *any* internal details in the pgp packets, as long as it is constrained by being compatible with ViaCrypt 2.4, we can always *guarantee* to be able to make a compatible free pgp based in 2.3a. And since the RSA and IDEA patents aren't valid in Europe, this is 100% kosher. You guys use MIT-PGP and we'll use free pgp 2.5 G