Why It Matters (Zero Trust Approach)


  • Zero Trust Means Human Verification

    Every login must prove:

    1. The user knows their rSecureKey and applies the correct color/style pattern
    2. The user controls their registered email and/or phone

    Simple for users. Hostile to automation.

  • Passwords No Longer Create Trust

    Passwords are reused, phished, and exposed at scale. Static credentials cannot defend against modern identity abuse.

  • MFA Without Cognitive Binding Falls Short

    Blind approvals and replayable codes allow attackers to blend into normal login flows. Without human-bound validation, MFA becomes predictable.

  • Expanding Attack Surface

    As adversaries evolve, older authentication layers become liabilities—putting sensitive systems and privileged accounts at increased risk.

How Rainbow Secure 2-Step Works

Step 1 — Enter Your rSecureKey

Users enter their secure key and apply their defined color/style pattern. If the formatting or pattern fails validation, the authentication attempt stops immediately.

Step 2 — Enter Your OTP

A one-time code is delivered via email or SMS, or split across both channels for distributed verification. User enters the code as received.
Alternatively, users may be challenged via the source IDP’s Authenticator app (Microsoft Authenticator, Google Authenticator) or Rainbow Secure TOTP Authentication

Step 3 — (Optional) Apply Color and Style Formatting

If configured, users apply the instructed color, font, or style formatting to the OTP—adding an additional cognitive verification layer that automation cannot execute.

Step 4 — Centralized Server Validates Identity

Rainbow Secure’s centralized authentication server processes the submitted formatted OTP, verifying credentials, visual formatting patterns, device context, and risk signals before granting access exclusively to the authenticated human user.

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Continuous Risk Checks (Zero Trust Enforcement)


Rainbow Secure evaluates each login for:
  • Bot behavior
  • Unusual location
  • Impossible travel
  • Repeated OTP failures
  • Suspicious devices
If risk indicators rise, access is automatically blocked or escalated with additional challenges.

Key Features (Zero Trust-Centric)


  • rSecureKey as the primary Zero Trust factor
  • Split OTP for multi-channel verification
  • Optional color/font/style cognitive validation
  • No mandatory apps or hardware tokens required
  • Works across devices and web applications
  • Continuous login behavior monitoring
  • Admin dashboard for policy, enforcement, and risk control
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Pricing & Editions


Two-step Authentication
Starting from: $2.00 per user per month

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