<html>
<body>
Clarification: The NSA ex-Top Secret Umbra document cited yesteday is
from the NSA journal "Cryptologic Quarterly," titled as shown
on the image below (not the file name), likely NSA author redacted, circa
1983 (154 footnotes dated 1977-1983). Last page shows source dated
1991.<br><br>
<a href="https://cryptome.org/2021/04/Joseph-Meyer-IEEE-1977.pdf" eudora="autourl">
https://cryptome.org/2021/04/Joseph-Meyer-IEEE-1977.pdf<br><br>
<br><br>
</a>
<img src="cid:7.1.0.9.1.20210501101723.01de4dd8@pipeline.com.0" width=869 height=258 alt="Emacs!">
<br><br>
<img src="cid:7.1.0.9.1.20210501101723.01de4dd8@pipeline.com.1" width=488 height=176 alt="Emacs!">
<br><br>
<img src="https://pbs.twimg.com/media/E0Ttl_wWUAYSCfK?format=jpg&name=small" alt="Image">
<br>
</body>
</html>