Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Secure data network system (SDNS) access control documents:



Charles Dinkel
- NIST IR 90-4259
Report Number
NIST IR 90-4259


Dinkel, C. (1990), Secure data network system (SDNS) access control documents:, , National Institute of Standards and Technology, Gaithersburg, MD, [online], (Accessed July 25, 2024)


If you have any questions about this publication or are having problems accessing it, please contact

Created January 1, 1990, Updated May 20, 2023