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.

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  A person responsible for the implementation of a Web site. Webmasters must be proficient in HTML and one or more scripting and interface languages, such as JavaScript and Perl. They may or may not be responsible for the underlying server, which is traditionally the responsibility of the Web administrator (see above).
NIST SP 800-44 Version 2