// Zero-Knowledge Proof Login Theater

Watch the difference between traditional and ZKP authentication in real-time. Your password never leaves your browser with ZKP!

Zero-Knowledge Proof Mode
Your password is hashed and used to generate a cryptographic proof. The server can verify you know the password without ever seeing it.
Login Credentials
Server View
$ waiting for request...
zkp_generation.log
$ waiting for input...
// HOW ZKP WORKS
01
Hash Password
Your password is hashed using SHA-256 on your device
02
Generate Proof
A cryptographic circuit creates a proof that you know the password
03
Send Proof
Only the proof and password hash are sent to the server
04
Verify
Server verifies the proof without ever seeing your password
// BENEFITS OF ZKP
No Password Transmission
Your password never leaves your device
Database Breach Protection
Even if the server is hacked, passwords stay safe
No Man-in-the-Middle
Intercepted proofs can't reveal the password
Privacy Preserving
Prove authentication without revealing sensitive data

// ARCHITECTURE COMPARISON

Traditional Authentication
Client (Browser)
username: "demo_user"
password: "SecurePass123!"
HTTPS
username + password
▼
Server
Receives plaintext password
Hashes & compares with DB
VULNERABILITIES:
  • - Password exposed in transit
  • - Server sees plaintext password
  • - DB breach reveals passwords
  • - Man-in-the-middle attacks
Zero-Knowledge Proof
Client (Browser)
username: "demo_user"
password: "SecurePass123!"
↓ SHA-256 Hash
↓ Generate ZK Proof
HTTPS
username + proof + hash
(NO PASSWORD)
▼
Server
Verifies proof mathematically
Never sees actual password
SECURITY BENEFITS:
  • + Password stays in browser
  • + Server never sees password
  • + DB breach safe
  • + MitM attacks useless
// TECHNICAL IMPLEMENTATION
1

Password Hashing

Client-side SHA-256 hashing converts password to a 256-bit hash. This happens entirely in the browser.

hash = SHA256(password)
2

Proof Generation

snarkjs generates a cryptographic proof using Groth16 protocol that proves knowledge of the password.

proof = zkSNARK(hash, circuit)
3

Server Verification

Server uses verification key to mathematically verify the proof without seeing the password.

verify(proof, publicSignals)
Key Insight: The proof is a mathematical guarantee that the client knows the password, without revealing any information about the password itself. Even quantum computers cannot reverse-engineer the password from the proof.