Enterprise-Grade Security

Built for Security-First Organizations

SignFortress combines End-to-End Encrypted Messaging with Server-Side Document Encryption at Rest, delivering professional-grade security suitable for banks, law firms, educational institutions, healthcare, and any organization handling sensitive documents.

Security Summary

SignFortress is built on a security-first architecture that protects documents, identities, and workflows through layered controls and modern cryptographic practices. The platform combines client-side protection, controlled server-side processing, and strict access enforcement to ensure that sensitive information remains confidential and tamper-resistant.

• Confidential by Design: Sensitive content is never exposed through URLs, public paths, or unsecured storage locations.
• Modern Cryptography: Documents and messages are protected using contemporary encryption standards with isolated per-file keys and controlled key management.
• Authenticated Access: Every document request is verified through identity checks and request validation to prevent unauthorized retrieval.
• Threat Screening: Uploaded files are scanned for known threats before entering the secure workflow.
• Integrity and Auditability: Completed documents include tamper-evident audit trails that record signer actions, timestamps, and verification data.
• Minimal Exposure Surface: Temporary data is short-lived and never placed in locations where it could be intercepted or reconstructed.
• Continuous Hardening: Security controls are reviewed and improved regularly to align with evolving best practices.

End-to-End Encryption (E2EE)

Messages and attachments exchanged inside a portal are protected with true end-to-end encryption. Only the sender and the intended recipient hold the cryptographic keys needed to decrypt content.

• Messages are encrypted in your browser before sending and stored only as ciphertext.
• Attachments are encrypted client-side using strong authenticated encryption.
• SignFortress servers never see or store plaintext versions of E2EE messages or files.
• Decryption happens only inside the secure portal on the authorized user’s device.

Encrypted Storage at Rest

All documents stored on our infrastructure are encrypted at rest, whether or not they use E2EE.

• E2EE Files: Stored exactly as encrypted binary blobs. They cannot be opened or interpreted on the server.
• Non-E2EE PDFs: Automatically encrypted server-side using strong encryption with a unique per-file key.
• Decryption keys for server-encrypted PDFs are stored separately from the files they protect.

Secure Document Pipeline

SignFortress uses a controlled, multi-layer document pipeline engineered to preserve confidentiality, enforce strict access boundaries, and prevent exposure of sensitive data at every stage of processing.

• Authenticated Streaming: Documents are delivered through a protected streaming endpoint that verifies user identity and request integrity before any content is released.
• Controlled Processing Environment: When documents are prepared for preview, signing, or automated analysis, they are handled inside a restricted environment that prevents unauthorized access or leakage.
• Key Isolation: Each document uses its own encryption key, and long-term secrets are stored separately from encrypted files.
• No Public Exposure: Document contents never appear in URLs, logs, or browser-visible paths.
• Short-Lived Working Copies: Any temporary data created during processing is automatically removed once the task is complete.
• Isolated Automation: Automated tools such as AI field detection and preview generation operate on controlled, temporary data and do not expose document contents outside the secure workflow.

Malware and Threat Scanning

All uploaded files are automatically scanned for known malware signatures before being stored. This protects users from malicious content without compromising privacy.

• Uploaded files are scanned safely before entering the secure workflow.
• Threats are blocked and removed automatically.
• Scanning occurs before any document is processed or stored.

Temporary File Auto-Purge

Files used for signing workflows or validation are automatically removed from the server shortly after processing.

• Temporary uploads are purged within minutes.
• Only documents you explicitly save remain stored.
• Manual purge options are available in the Signature Validator.

Cloud Storage Option

Prefer not to store documents on our servers? You can route files directly to your own cloud storage.

• Supports Microsoft OneDrive, Google Drive, and Dropbox.
• Files are uploaded directly to your account and removed from our servers after processing.
• You retain full control and can revoke access at any time.

Account and Access Controls

Multiple layers of protection safeguard your dashboard and documents.

• Strong password requirements and automatic session timeouts.
• Optional PIN protection for Document Library and Signing History.
• Recipients sign using unique, one-time secure links.

Zero Trust Architecture

SignFortress follows a Zero Trust approach where no request is trusted by default. Every action is validated, authenticated, and authorized.

• Identity Verification: Every document request is tied to a verified user session.
• Least Privilege: Users only access documents they own or have been granted access to.
• Continuous Validation: Access tokens and nonces are checked on every sensitive operation.
• Segmentation: Document storage, key material, and user data are isolated to reduce exposure.

Data Handling Overview

Data is handled with strict controls to ensure confidentiality, integrity, and availability throughout the document lifecycle.

• Minimal Retention: Only essential data is stored, and temporary data is removed promptly.
• Secure Transmission: All communication between clients and servers uses encrypted channels.
• Controlled Access: Internal systems operate with restricted privileges and cannot access user content without authorization.
• Privacy Respect: Sensitive content is never used for analytics or training.

Security for Professionals

SignFortress is designed for professionals who require confidentiality, compliance, and verifiable integrity in their document workflows.

• For Lawyers: Confidential client documents remain protected throughout the entire workflow, with tamper-evident audit trails for legal defensibility.
• For Accountants: Financial statements, tax forms, and sensitive records are handled in a controlled environment with strict access boundaries.
• For Financial Advisors: Client portfolios and advisory documents benefit from strong encryption and authenticated access controls.
• For All Professionals: Every completed document includes a verifiable audit trail suitable for compliance reviews and regulatory checks.

Compliance Overview

SignFortress aligns with industry expectations for electronic signatures, data protection, and auditability. Our controls support compliance with widely recognized standards and regulatory frameworks.

• Electronic Signature Standards: Workflows align with ESIGN and UETA requirements for signer intent, identity verification, and document integrity.
• Data Protection Principles: Access control, encryption, and minimal exposure support privacy and confidentiality expectations.
• Audit-Ready Records: Completed documents include detailed audit trails suitable for compliance reviews.
• Security Best Practices: Controls are reviewed and updated regularly to reflect evolving industry guidance.

Ongoing Security Focus

We continually strengthen our protections based on real-world use and evolving best practices. Our priority is delivering reliable, transparent security that professionals can trust.

Contact Us

Have a security question or suggestion? We respond quickly. Email us anytime.