Securely Storing and Transmitting CUI: Meeting NIST/CMMC Requirements with SynaMan

Executive Summary

Protecting Controlled Unclassified Information (CUI) is critical for the security of government information systems. The National Institute of Standards and Technology (NIST) and the Cybersecurity Maturity Model Certification (CMMC) provide guidelines for storing and transmitting CUI. SynaMan helps organizations meet these requirements by providing a secure and compliant storage and transmission solution for CUI. This whitepaper highlights how SynaMan meets NIST/CMMC requirements and helps organizations achieve compliance while increasing operational efficiency.


Organizations that store and transmit CUI must comply with NIST/CMMC guidelines to maintain eligibility for government contracts and avoid breaches of sensitive information. SynaMan provides a comprehensive solution to address CUI's storage and transmission requirements. This whitepaper explains how SynaMan's features and benefits support CUI's secure storage and transmission, ensuring compliance with NIST/CMMC guidelines.

Features And Benefits

SynaMan offers several features that support the secure storage and transmission of CUI, including:

  1. End-to-End Encryption: SynaMan uses end-to-end encryption to protect the confidentiality and integrity of CUI during storage and transmission. This feature ensures that only authorized personnel can access CUI.
  2. Access Control: SynaMan has access controls that limit access to CUI based on user roles and permissions. This feature ensures that only authorized personnel can access CUI.
  3. Access Logs: SynaMan provides detailed audit trails of all CUI-related activities, including who accessed the data, when, and from where. This feature helps organizations meet NIST/CMMC requirements for logging and monitoring.
  4. Audit Logs: SynaMan generates compliance reports and audit logs that help organizations demonstrate their compliance with NIST/CMMC guidelines. These logs provide detailed information on how SynaMan meets NIST/CMMC requirements, ensuring that organizations can easily pass compliance audits.
  5. FIPS 140-2 Compliant: SynaMan is compliant with FIPS standards, which is essential for organizations that handle CUI because it ensure that data is produced with the highest level of security.

Sharing Documents Via Email

Email is a widely used communication tool in the modern workplace. It is often used to send and receive sensitive documents such as contracts, legal documents, financial reports, and other Controlled Unclassified Information (CUI) forms. However, sending secure documents via email comes with inherent risks, and taking measures to mitigate these risks is essential.

Xeams is an email server that provides a secure platform for organizations to send and receive emails, including emails containing Controlled Unclassified Information (CUI). When combined with SynaMan, Xeams can help organizations securely share CUI in several ways:

  1. End-to-End Encryption: Xeams supports end-to-end encryption, meaning emails containing CUI are encrypted from the sender's client software to the recipient's client software. This ensures that the contents of the email remain confidential and are only accessible by authorized individuals.
  2. Content Filtering: Xeams has content filtering capabilities that can scan emails for CUI and other sensitive information. This feature ensures that CUI is not inadvertently shared via email and helps to prevent data breaches.
  3. Compliance Reports: Xeams generates compliance reports that can be used to demonstrate compliance with regulatory requirements such as HIPAA, GDPR, and SOX. These reports provide detailed information on email activity, including emails containing CUI that were sent and received.
  4. Integration with SynaMan: Xeams can be integrated with SynaMan, which provides a secure file transfer platform for sending and receiving CUI. When combined with Xeams, SynaMan can be used to send large files containing CUI that cannot be sent via email due to size limitations.


SynaMan helps organizations securely store and transmit CUI while meeting NIST/CMMC requirements. With features such as end-to-end encryption, access control, audit trails, and compliance reports, SynaMan provides a comprehensive solution to address CUI's storage and transmission requirements. Using SynaMan, organizations can ensure compliance with NIST/CMMC guidelines while increasing operational efficiency. Additionally, by combining Xeams and SynaMan, organizations can ensure that CUI is securely shared via email and file transfer,


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