NSA Cybersecurity Advisories & Guidance


NSA leverages its elite technical capability to develop advisories and mitigations on evolving cybersecurity threats.

Browse or search our repository of advisories, info sheets, tech reports, and operational risk notices listed below. Some resources have access requirements.

For a subset of cybersecurity products focused on telework and general network security for end users, view our Telework and Mobile Security Guidance page here.

ImageTitlePublication Date
 Info Sheet: Selecting a Protective DNS Service (May 2021 Update)5/31/2021
 Potential Threat Vectors To 5G Infrastructure5/10/2021
 ADVISORY FURTHER TTPS ASSOCIATED WITH SVR CYBER ACTORS.PDFCybersecurity Advisory: Further TTPs associated with SVR cyber actors5/7/2021
 CSA: Stop Malicious Cyber Activity Against Connected Operational Technology4/29/2021
 CSA: Russian SVR Targets U.S. and Allied Networks4/15/2021
 Info Sheet: Embracing a Zero Trust Security Model (February 2021)2/25/2021
 Info Sheet: Adopting Encrypted DNS in Enterprise Environments (January 2021)1/14/2021
 ELIMINATING_OBSOLETE_TLS_UOO197443-20.PDFInfo Sheet: Eliminating Obsolete TLS Protocol Configurations (January 2021)1/5/2021
 AUTHENTICATION_MECHANISMS_CSA_EXEC_U_OO_198854_20.PDFCybersecurity Advisory: (Abridged) Detecting Abuse of Authentication Mechanisms (December 2020)12/17/2020
 AUTHENTICATION_MECHANISMS_CSA_U_OO_198854_20.PDFCybersecurity Advisory: (Full) Detecting Abuse of Authentication Mechanisms (December 2020)12/17/2020
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NSA Joint Federation Assurance Center (JFAC) Hardware Assurance Lab Cybersecurity Technical Reports:

ImageTitlePublication Date
 NSA CTR: DoD Microelectronics: Field Programmable Gate Array Best Practices – Threat Catalog12/8/2022
 NSA CTR: DoD Microelectronics: Field Programmable Gate Array Level of Assurance 1 Best Practices12/8/2022
 NSA CTR: DoD Microelectronics: Field Programmable Gate Array Overall Assurance Process12/8/2022
 NSA CTR: DoD Microelectronics: Third-Party IP Review Process for Level of Assurance 112/8/2022
 CTR: DoD Microelectronics: Levels of Assurance Definitions and Applications7/14/2022
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Additional Documents

Some guidance is protected and requires use of a DoD Common Access Card (CAC) to access. Visit https://cyber.mil/nsa/cybersecurity-advisories-and-technical-guidance/ to access the following and other protected documents:

  • Avoid Dangers of Wildcard TLS Certificates and the ALPACA Technique (FOUO version)
  • Protecting VSAT Communications
  • Quantum Security of Symmetric Cryptography and Hash Functions: A Review
  • Securing AWS S3
  • Security Considerations for Office 365 Government Customers