That statement is, at best, misleading. The vast majority of what the US government has tried to ban was export of cryptography tools. However, as your own lin

That statement is, at best, misleading. The vast majority of what the US government has tried to ban was export of cryptography tools. However, as your own link makes clear, they stopped doing that in 2000. Furthermore, what was restricted was not "open source cryptography"; it was cryptography that they could not break. The only way that open source comes into it is that that is what made it abundantly clear that the cat was out of the bag and there was no going back. Hm. Kind of like this situation.