Cryptographic Proof of Real Human Interaction Without CAPTCHA

FreQuid Network is building next-generation identity infrastructure beyond traditional PKI, using signal-based and distributed verification enabled by CAIBE.

CAIBE Protocol

CAIBE is a cryptographic challenge–response system that verifies live, genuine human interaction at the protocol level—preventing bots, replay attacks, and scripted abuse without CAPTCHA, biometrics, or user tracking.

FreQuid provides CAIBE as an open, auditable security primitive for modern applications.

The Problem in the IAM Industry

Modern applications face persistent automated abuse:

Bots bypass CAPTCHA at scale

Replay attacks exploit static or reusable challenges

Automation frameworks simulate human behavior

Biometric and fingerprinting approaches compromise privacy

Security controls degrade user experience without stopping determined attackers

Current solutions force a tradeoff between usability, privacy, and effective security.

The Solution

CAIBE (Challenge-Adaptive Interaction-Bound Encryption) verifies that a request originates from a live, interactive session—not from scripts, bots, or replayed credentials.

Instead of requiring users to prove they are human, CAIBE cryptographically proves that real interaction occurred.

By binding cryptographic challenges to dynamic, time-sensitive interaction signals, CAIBE prevents reuse, automation, and replay at the protocol level—without introducing user friction.