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Protection That Travels With Your Files
Theodosian encrypts and applies dynamic access controls directly to files, so your most sensitive data stays protected across cloud storage, endpoints, email, contractor networks, and beyond. When credentials are compromised or insiders go rogue, your data remains encrypted and unusable.
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Zero-Knowledge Encryption
Context-Aware Access Controls
Works with your Existing Stack
Deploy in Days, Not Months
Data-Centric Security

How Theodosian Protects Data: Three-Layer Architecture

The Theodosian platform implements data-centric security through three integrated layers that work together to protect files at creation, enforce access at the moment of use, and provide continuous visibility.

1
Every File Gets Its Own Encryption Layer
Theodosian automatically encrypts files using FIPS 140-3 validated AES-256 encryption. Each file is encrypted individually with its own unique key.
True End-to-End Encryption
Files are encrypted at the source before transmission. They remain encrypted in cloud storage, on endpoints, in email, and on backup media. Only authorized users with the correct decryption keys can access.
"In-Use" Encryption
Unlike traditional encryption that decrypts files to plaintext on disk when opened, Theodosian streams small bytes of in-use data to memory-only. Files are never written to disk in plaintext form, dramatically reducing endpoint exposure from malware, forensic tools, or physical device theft.
Protection Survives File Operations
Encryption persists when files are: Copied or moved to new locations, Synced to personal cloud storage (Dropbox, iCloud, etc.), Downloaded to unmanaged devices, Attached to emails or messages, Backed up to external media, etc.
Zero-Knowledge Architecture
Theodosian never has access to your decryption keys or plaintext data. Our patented decentralized key management system ensures that no unauthorized party—including Theodosian staff, cloud admins, or attackers—can decrypt your files. Even if our systems were compromised, your data remains protected. There is no master key, no honeypot and key management/rotation is built in by default.
2
Access Decisions Happen in Real Time, Based on Context
Every time a user attempts to open a protected file, Theodosian evaluates the request against your defined policies in milliseconds, silently in the background. Access is granted only if policy conditions are met.

You decide what controls to implement for different data protection policies:
Identity & Attributes
Optionally tied to an identity provider such as Entra.
Approved Devices
Restrict access to managed, registered, or company-owned devices only.
Device Compliance Status
OS version, security patches, endpoint protection, etc.
Geographic Restrictions
U.S.-only for ITAR, block embargoed countries, limit to specific office locations.
Network Type
Require or prohibit a VPN, only allow access from specified networks, etc.
IP Address Allow / Deny
Permit or block access based on specific IP addresses or ranges.
Time-based Controls
Business hours only, temporary contractor access with expiration.
Anomalous Activity
Behavioral anomalies such as unusual access patterns, bulk downloads, off-hours activity.
Authentication Challenges
Step-up MFA for high-risk scenarios, remote access, sensitive files, unusual location.
Biometric Verification
Fingerprint and FaceID, if supported by device.
Require Approvals
Require real-time admin approval before granting access to specified files.
Conditional Logic
"If accessing from home AND file is marked 'highly sensitive' THEN require MFA".
3
Know Who's Accessing What, And Stop Threats Before Data Is Stolen
Theodosian logs every access attempt, allowed and denied, with full context. Admins have real-time visibility into data access patterns, and the platform can automatically respond to anomalies.

Comprehensive Audit Trails

Theodosian logs detailed information for every file access attempt, including:

User Identity
Authenticated user, guest, sessions.
File Information
File name, path, sensitivity classification.
Device Information
Timestamp, Device (type, ID, compliance status).
Location
IP address, approved countries, GPS coordinates.
Network
Corporate network, VPN, public networks.
Policy Outcome
Access granted, access denied, MFA challenged, and more.

Anomaly Detection & Alerting

Theodosian automatically flags suspicious behavior, including:

Unusual Access Patterns
User accessing files outside their normal scope.
Bulk Downloads
Large number of files accessed in short timeframe.
Geographic Anomalies
Access from unexpected locations.
Off-hours Activity
Access outside normal working hours.
Failed Access Attempts
Repeated denials suggesting reconnaissance or brute force.

Automatic "Drop the Gate"

When anomalous behavior is detected, Theodosian can automatically:

Freeze Access
Freeze a user's access to all protected files.
MFA Enforcement
Require step-up authentication (MFA) before allowing further access.
Notify Team
Notify security team with detailed context.
The Critical Difference
With Theodosian, the alert you receive is that access has been blocked, not that data has been stolen. You're notified of the attempt, not the breach.

Deploy in Days, Not Months, Without Migrating Data or Disrupting Workflows

Theodosian is designed to integrate with your existing infrastructure via API. There's no data migration and no workflow changes for end users. Theodosian’s architecture supports single-tenant and data sovereignty by default.

Cloud Storage
Microsoft 365 (SharePoint, OneDrive), Google Workspace (Drive), Dropbox, Box.
Network Storage
Windows File Servers, NAS, SMB/CIFS shares.
Endpoints
Windows, macOS (lightweight agent for local file protection).
Identity Providers
Active Directory, Okta, Google Workspace Directory, SAML/OIDC.
Data Classification
Ingest the tags for data that has already been classified & map to protection policies.
Security Tools
Works alongside your existing security tools including DLP, Microsoft Purview, etc.

Deploy in 3 Easy Steps

1
Connect
Authenticate Theodosian with your cloud storage provider(s).
Optional: connect to your identity provider.
Optional: Deploy lightweight endpoint agent (Windows/macOS) to in-scope users.
2
Configure
Define which files to protect (by folder, keyword, metadata, manual tagging).
Set access policies (who can access, from which devices/locations/networks).
Optional: Use our pre-designed compliance templates (CMMC, ITAR, HIPAA) or create custom policies.
3
Protect & Monitor
Files are encrypted automatically based on policies.
Access controls enforced in real time.
Audit logs accumulate continuously & anomaly alerts trigger as needed.

Built to Meet the World's Strictest Security & Compliance Requirements

Theodosian is designed from the ground up to support high-assurance environments where data protection and compliance are non-negotiable.

FIPS 140-3 Validated Encryption
All cryptographic operations use FIPS 140-3 validated modules.
CMMC Level 2/3 Ready
Addresses 20+ CMMC practices across AC, SC, AU, IR domains.
ITAR Compliant Architecture
Supports U.S. Person access restrictions and 22 CFR § 120.54 encryption carve-out.
HIPAA Compliant Controls
Meets encryption, access control, and audit requirements for ePHI protection.
CJIS Compliant
Supports Criminal Justice Information protection requirements.
FedRAMP Ready
Architecture supports FedRAMP Moderate environments.

Ready to See Theodosian’s Data-Centric Security Platform in Action?

Book a technical deep-dive with our security architects, or start a hands-on proof of concept in your environment.

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Frequently Asked Questions
Technical Questions, Answered.

Theodosian is available as a lightweight desktop agent that runs on both Windows and macOS. The agent operates seamlessly in the background, providing robust data protection without disrupting your workflow.

No, there is no impact to performance. Protected files open seamlessly and instantly—as long as you meet all the access controls defined for that specific file. The encryption and decryption process happens transparently in the background.

Yes, every customer deployed on Theodosian is single tenant by default. This ensures complete isolation of your data and infrastructure from other customers, providing enhanced security and control.

Yes, Theodosian currently supports data residency in U.S. FedRAMP, European Union, and Global regions. Additional data residency options are available upon request to meet your specific compliance and regulatory requirements.