Built for Trust: How Nitro Sign Protects Your Documents with Enterprise-Grade Security

Electronic signatures play a vital role in today’s digital workflows, from finalizing contracts and onboarding clients to handling confidential HR paperwork. But when documents are signed electronically, data security is no longer a nice-to-have. It's essential.

That’s why Nitro Sign is built from the ground up to prioritize protection. Our platform incorporates multi-layered security controls, global compliance certifications, and a proactive approach to risk management. The result? A signing experience that protects your data, your business, and your peace of mind.

A layered approach to document protection

Nitro Sign takes a holistic view of security, ensuring your documents are protected at every stage of the signing process. This includes everything from encryption and authentication to infrastructure and auditing.

Every interaction—whether uploading, signing, or archiving—is protected by end-to-end encryption. Nitro Sign uses industry-standard protocols to secure your data in transit and at rest, which means your documents stay private and protected, no matter where or how they’re accessed.

Under the hood, Nitro Sign is hosted on trusted infrastructure provided by Microsoft Azure and Amazon Web Services (AWS). Our data centers span key locations across Europe, including Frankfurt, Amsterdam, Dublin, and Zurich. This supports data residency and sovereignty requirements for organizations operating in highly regulated industries.

Strong identity and access controls

When signing workflows involve sensitive information, it’s critical to verify who’s accessing and signing your documents and ensure that only the right people can take action.

Nitro Sign provides multi-factor authentication via SMS and email-based one-time passwords (OTPs). This added layer helps verify signer identity and blocks unauthorized access or fraudulent attempts.

For workflows with more rigorous requirements, Nitro Sign also offers optional ID verification. This feature helps you meet compliance needs tied to standards like eIDAS in the EU or ZertES in Switzerland by validating signer identities before a document is finalized.

Transparent audit trails for every document

Security isn’t just about prevention—it’s also about visibility. Nitro Sign creates a detailed audit trail for every document transaction, providing a time-stamped log of who did what, when, and how.

Each audit trail includes:

• The identity of document viewers and signers.
• The method of authentication used.
• Time and date stamps for all actions.
• Any changes or updates made during the process.

These logs are tamper-proof and fully downloadable, giving your team a complete, defensible record of activity. This transparency supports accountability and builds trust with your customers and stakeholders.

Global certifications that reinforce trust

Nitro Sign meets some of the most rigorous global security standards and undergoes regular third-party audits to maintain certification.

Current certifications include:

• SOC 2 Type II for secure operational processes and internal controls.
• ISO/IEC 27001 for information security management systems.
• HIPAA compliance for protecting healthcare-related data.

These certifications reflect Nitro’s long-term investment in information security, not just at the platform level, but across our organization, policies, and internal training.

Built-in resilience and proactive risk management

Cyber threats continue to evolve, and Nitro evolves with them. Our security team continually updates policies, systems, and protections to stay ahead of emerging risks.

We maintain rigorous internal practices such as secure software development lifecycles, role-based access controls, and ongoing employee security training. Ongoing threat monitoring and proactive patching help us neutralize vulnerabilities before they pose a risk.

It's a forward-thinking approach enables us to provide a signing platform that’s not only secure today but also built to withstand tomorrow’s risks.

An open approach to vulnerability disclosure

We know that no platform is immune to risk. That’s why Nitro maintains a responsible vulnerability disclosure program to work collaboratively with the security research community.

Through this program, independent researchers can report potential issues in a secure, responsible way. We reward valid reports and take rapid action to address verified vulnerabilities, helping us strengthen the platform for everyone.

Security is a shared responsibility, and by inviting input from external experts, we’re continually improving our defenses and reducing risk.

Security that empowers your business

At its core, digital signing should make work easier rather than introduce uncertainty. Nitro Sign is designed to provide the confidence and control you need to move your business forward, securely and efficiently.

Whether you're managing cross-border contracts, signing healthcare records, or finalizing internal approvals, Nitro Sign gives you the protection and peace of mind to do it all, without compromise.

If you’re ready to experience enterprise-grade document security in action, start your free trial or connect with our team. Let us show you how Nitro Sign protects your most important agreements—simply, securely, and without compromise.