From a cursory read of the PDF [1], it would seem that Mr. Nash was describing a stream cipher [2]. [1] http://courses.csail.mit.edu/6.857/2012/files/H03-Crypt

From a cursory read of the PDF [1], it would seem that Mr. Nash was describing a stream cipher [2]. [1] http://courses.csail.mit.edu/6.857/2012/files/H03-Cryptosystem-proposed-by-Nash.pdf http://courses.csail.mit.edu/6.857/2012/files/H03-Cryptosyst... [2] http://en.wikipedia.org/wiki/Stream_cipher http://en.wikipedia.org/wiki/Stream_cipher