About Circle Security
Building the Human Identity Layer for the AI Era
Founded to re-architect trust for the modern internet, Circle Security eliminates transferable credentials, delivering human bound authentication: identity that can't be shared, stolen, or automated.
Eliminate Credentials. Prove the Human.
Every breach begins with a credential. Circle Security was founded to end that. Circle Access eliminates passwords, tokens, and stored secrets entirely, replacing them with human bound authentication that verifies real human presence through biometric-bound cryptographic proof.
In an era where AI can generate convincing deepfakes, synthetic identities, and automated impersonation at scale, the old model of passwords and shared secrets is broken. We're building the infrastructure to replace it: a human identity layer that makes every authentication event a cryptographic proof of real human presence.
No credentials to steal. No secrets to protect. Just cryptographic proof between trusted biometric devices and Circle, with a comprehensive tamper-proof audit trail; who accessed what, when, from which device.
The Credential Crisis Has Reached a Breaking Point
81% of data breaches involve compromised credentials. Executive Order 14028 mandates phishing-resistant authentication. CMMC 2.0 requires credential protection at the architectural level.
The industry has responded with "passwordless" solutions that still store secrets: biometric templates, device keys, authentication tokens. These remain stealable. They remain vulnerabilities.
Circle Security took a different approach: eliminate credentials entirely. No storage means no theft. No secrets means no breach surface. This is not an incremental improvement. This is architectural evolution.
The Evolution of Authentication
Led by Security Architects and Industry Pioneers
Sara Duryea
Founder & CEO
Sara Duryea is the founder and visionary patent holder behind the core technology that uniquely distinguishes Circle's cybersecurity products in the market.
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Gene Allen
Chief Technology Officer
Gene is a veteran product engineering leader with 25+ years building and scaling cybersecurity platforms and bringing to market innovations in identity, data protection, and privacy.
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Tom Craft
Sr. Director of Special Projects
Tom Craft (Army EOD veteran) is an operations and special projects leader who delivers mission critical, prevention first cybersecurity, training initiatives, and secure, scalable infrastructure to strengthen readiness and resilience.
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"Circle Security isn't just solving the credential problem; they're architecting past it entirely. This is the direction authentication must go."
— Bruce Schneier
One of the world's most cited security technologists, renowned cryptographer, and author of 14 books.
What We Stand For
Transparency over trust
No secrets stored. Our architecture is open for security review because we have nothing to hide.
Innovation through simplicity
The strongest security feels effortless. Circle users authenticate in 2 seconds with a QR scan.
Compliance through design
Built from the ground up to align with EO 14028, NIST 800-207, and CMMC frameworks.
Interoperability, not disruption
Works beneath your existing IAM stack: Okta, Azure, CAC/PIV, and more. No rip-and-replace.
Proven Architecture. Real-World Impact.
reduction in password resets
reduction in cyber-insurance premiums
zero storage = zero credential breaches
A Future Without Credentials
Security shouldn't depend on what users know; it should rely on what can't be stolen. Circle is building that future today, where trust is verified through cryptography, not secrets.
Join us in eliminating credentials from the internet.
A Future with Human Bound Identity
Security shouldn't depend on what users know; it should rely on who they are. Circle is building that future today, where trust is verified through human presence and cryptographic proof, not secrets.