Modern Authentication for Outdated Systems
Modern Authentication for Outdated Systems
Add phishing-resistant passkeys and strong MFA to legacy apps without rewriting code or replacing your existing stack.
Add phishing-resistant passkeys and strong MFA to legacy apps without rewriting code or replacing your existing stack.




Why Modernize Legacy Application Security with Secfense
Why Modernize Legacy Application Security with Secfense
Add strong authentication without code changes
Deploy passwordless login or multi-factor authentication into legacy applications, even if they lack SAML or OIDC support.
Add strong authentication without code changes
Deploy passwordless login or multi-factor authentication into legacy applications, even if they lack SAML or OIDC support.
Add strong authentication without code changes
Deploy passwordless login or multi-factor authentication into legacy applications, even if they lack SAML or OIDC support.
Protect against phishing and credential theft
FIDO2/WebAuthn passkeys eliminate are bound to domain, stopping phishing attacks at the source.
Protect against phishing and credential theft
FIDO2/WebAuthn passkeys eliminate are bound to domain, stopping phishing attacks at the source.
Protect against phishing and credential theft
FIDO2/WebAuthn passkeys eliminate are bound to domain, stopping phishing attacks at the source.
No-code, agentless deployment
Works as a reverse proxy, no changes to application source code or installation on endpoints.
No-code, agentless deployment
Works as a reverse proxy, no changes to application source code or installation on endpoints.
No-code, agentless deployment
Works as a reverse proxy, no changes to application source code or installation on endpoints.
Maintain existing logins during migration
Hybrid setup allows gradual rollout without disrupting operations.
Maintain existing logins during migration
Hybrid setup allows gradual rollout without disrupting operations.
Maintain existing logins during migration
Hybrid setup allows gradual rollout without disrupting operations.
Built for Complex, Legacy Environments
Built for Complex, Legacy Environments
Whether you’re securing a mainframe portal, on-prem ERP, or a custom-built business tool, Secfense enables:
Whether you’re securing a mainframe portal, on-prem ERP, or a custom-built business tool, Secfense enables:
Secure login with passkeys
Compatibility with any IdP (SAML, OIDC, or proprietary)
Flexible fallback options such as TOTP, SMS, or email.
No disruption to front-end or back-end systems
Case Study: Modern Authentication in Financial Services
Case Study: Modern Authentication in Financial Services
A major financial institution implemented passwordless login for its business clients on the corporate banking platform:
A major financial institution implemented passwordless login for its business clients on the corporate banking platform:
No code changes to application or identity provider
No code changes to application or identity provider
Passkey interface added to existing infrastructure
Passkey interface added to existing infrastructure
Secure session handling integrated with current authentication
Secure session handling integrated with current authentication
Gradual rollout with selected user groups
Gradual rollout with selected user groups
The result: A modern, compliant, and disruption-free login experience for clients.
The result: A modern, compliant, and disruption-free login experience for clients.




How It Works
How It Works
How It Works
Detects the legacy login flow in real time
Detects the legacy login flow in real time
Injects passkey or MFA UI dynamically
Injects passkey or MFA UI dynamically
Validates authentication via Secfense server (FIDO2, certificates, or hardware keys)
Validates authentication via Secfense server (FIDO2, certificates, or hardware keys)
Hands off authenticated sessions to your existing IdP or session manager
Hands off authenticated sessions to your existing IdP or session manager
Agentless, invisible to end users, and compatible with even the most outdated systems.
Agentless, invisible to end users, and compatible with even the most outdated systems.
Security & Compliance by Design
Security & Compliance by Design
Secfense authentication flows meet modern standards and regulations:
NIS2, DORA, PSD2 SCA, GDPR
Multi-factor assurance (possession + inherence)
Cryptographic binding of sessions
Secure on-device key storage
Security & Compliance by Design
Secfense authentication flows meet modern standards and regulations:
NIS2, DORA, PSD2 SCA, GDPR
Multi-factor assurance (possession + inherence)
Cryptographic binding of sessions
Secure on-device key storage
Security & Compliance by Design
Secfense authentication flows meet modern standards and regulations:
NIS2, DORA, PSD2 SCA, GDPR
Multi-factor assurance (possession + inherence)
Cryptographic binding of sessions
Secure on-device key storage
Why IT Leaders Choose Secfense for Legacy Systems
Why IT Leaders Choose Secfense for Legacy Systems
Secfense acts as an authentication broker deployed via reverse proxy. It detects login flows in real time and dynamically inserts secure authentication options like:
Secfense acts as an authentication broker deployed via reverse proxy. It detects login flows in real time and dynamically inserts secure authentication options like:
Add phishing-resistant MFA without rewriting apps
Add phishing-resistant MFA without rewriting apps
Preserve existing infrastructure and investments
Preserve existing infrastructure and investments
Reduce password resets and lockout support costs
Reduce password resets and lockout support costs
Extend life of business-critical applications securely
Extend life of business-critical applications securely
Secure Legacy Applications Without Disruption
Secure Legacy Applications Without Disruption
Secure Legacy Applications Without Disruption
Use Cases
Secfense Inc.
350 Townsend Street #670, San Francisco, CA 94107, US
Secfense Sp. z o.o.
Dolnych Młynów 3/1 , 31-124 Kraków, EU, VATID: PL6762546545
© Copyright 2025 Secfense. All rights reserved.
Use Cases
Secfense Inc.
350 Townsend Street #670, San Francisco, CA 94107, US
Secfense Sp. z o.o.
Dolnych Młynów 3/1 , 31-124 Kraków, EU, VATID: PL6762546545
© Copyright 2025 Secfense. All rights reserved.
Use Cases
Secfense Inc.
350 Townsend Street #670, San Francisco, CA 94107, US
Secfense Sp. z o.o.
Dolnych Młynów 3/1 , 31-124 Kraków, EU, VATID: PL6762546545
© Copyright 2025 Secfense. All rights reserved.
Use Cases
Secfense Inc.
350 Townsend Street #670, San Francisco, CA 94107, US
Secfense Sp. z o.o.
Dolnych Młynów 3/1 , 31-124 Kraków, EU, VATID: PL6762546545
© Copyright 2025 Secfense. All rights reserved.