How do we secure and provide a legally binding level of trust on the Internet?

Write a research paper on digital signatures and certifying authorities including their relation to RSA Public and Private Key encryption. This research paper should be at least 800 – 1100 words and include references to the legal status in developed nations, the mathematics behind the technology, what are the major recognized authorities, and the likely future for this technology/business practice. The researcher should find the major US entities and how they relate and trust each other. On the legal topic, the researcher should find national and state laws and standards. You may also find laws from other countries and international organizations. Since many of these laws are now a decade or more old, we could also find legal interpretations of the law itself.