Doesn't look like there are any..
Two. One for encryption, and one for decryption. RSA is an example of an asymmetric encryption algorithm.
<span>The National Science Foundation (NSF) is the organization which </span><span>developed a network called CSNET to provide a network free to all American research and educational institutions. It is an agency in the government of the United States that is responsible for research and development in the field of science and engineering. </span>
That would be an Ergonomic keyboard, due to the fact that it is laid out in such a way that doesn't harm your wrists