Letters Cryptography, NSF, and NSA See allHide authors and affiliations Science 28 Nov 1980:Vol. 210, Issue 4473, pp. 960-962DOI: 10.1126/science.210.4473.960-a RICHARD MANDELBAUMFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears below.
Science Vol 210, Issue 447328 November 1980 Table of Contents Print Table of Contents Ed Board (PDF) Front Matter (PDF)