Access to the Homeland Security Digital Library

Approximately 1/3 of the Homeland Security Digital Library (HSDL) resources are not openly available to the public at large. See the three options below to determine whether you are eligible for further access.

Individual Access
Type: username/password authentication with account from the NPS Center for Homeland Defense and Security (CHDS).

Eligibility: U.S. citizens who are:

  • federal, territorial, tribal, state, or local U.S. government officials;
  • members of the U.S. military;
  • homeland security researchers and academics; or
  • security staff protecting organizations vital to U.S. infrastructure

Access duration: unlimited while eligible

Request access:

Sign-in to CHDS – or – Create a CHDS Account

Organization-wide Access
Type: IP range authentication for your network

Eligibility: U.S. organizations that are:

  • military installations;
  • federal, territorial, tribal, state, or local U.S. government agencies; or
  • public-sector research institutions or university libraries

Access duration: unlimited while eligible

Contact hsdl@nps.edu with any questions about your IP ranges or configuring EZ-Proxy.

Restricted Collection Access
About the Restricted Collection

Type: username/password authentication

Pre-requisite: active, individual account access (see above)

Eligibility: U.S. citizens who are:

  • federal, territorial, tribal, state,
  • local U.S. government officials; or
  • active members of the U.S. military

You must be able to verify this eligibility with an official email address issued by your agency.

Access duration: re-request every six months

Request access:

Sign-in to the HSDL