I have a good idea that is non-obvious and new. I want to make this technology (a new encryption technique) available for everyone to use, and keep it entirely patent-free, including myself. I have written a paper that describes the technology in enough detail to be able to prove it to be prior art for patents on this idea, however the paper is not yet ready to be published.
I am communicating with various people about my ideas however, and I'd like to avoid the possibility of them (or others who see the communication) filing a patent. Is there a way to provably put my ideas so far in the public domain, such that if someone tries to patent my idea I can prove prior art?
I have a PDF on a publicly accessibly web server, but right now I have no way of proving that I put the file up there before a patent application.
A solution available through the internet would be highly preferred. I am a student not living in the US, and I don't really have the money to send mail to the US. Hiring a lawyer / physical presence in the US is downright impossible financially.