Security & Privacy

Our commitment to protecting your authentication data and maintaining the highest security standards

🔒 Zero Server-Side Storage

Your secret keys never leave your browser. All TOTP generation happens locally on your device.

How We Protect Your Data

Security is at the core of everything we do. Our TOTP generator is designed with privacy-first principles, ensuring your sensitive authentication data remains under your complete control.

🖥️

Client-Side Processing

All TOTP calculations occur entirely in your browser using JavaScript. No data is transmitted to our servers.

🔐

No Data Collection

We don't collect, store, or log your secret keys, generated codes, or any personally identifiable information.

🛡️

HTTPS Encryption

All connections use TLS 1.3 encryption with HSTS to prevent man-in-the-middle attacks and ensure secure transmission.

📱

Offline Capable

Once loaded, the generator works completely offline, providing security even without internet connectivity.

🔍

Open Source

Our code is publicly available for security auditing and transparency. You can verify our security claims.

⚡

Modern Cryptography

Implementation uses Web Crypto API with HMAC-SHA1 following RFC 6238 specifications exactly.

Technical Security Implementation

Cryptographic Standards

Our TOTP implementation strictly adheres to industry standards and best practices:

RFC 6238 Compliance

HMAC-SHA1 cryptographic hash function
Base32 secret key encoding (RFC 4648)
30-second default time step with configurable periods
Dynamic truncation algorithm for code generation
Big-endian byte ordering for time counter
Unix epoch (1970-01-01 00:00:00 UTC) as T0

Browser Security Features

We leverage modern browser security capabilities to protect your data:

Web Crypto API: Uses browser's native cryptographic functions for secure key derivation and hashing
Content Security Policy (CSP): Prevents code injection and ensures only authorized scripts execute
Subresource Integrity (SRI): Validates external resources to prevent tampering
No Third-Party Analytics: Zero tracking scripts or external data collection services
Secure Context Required: HTTPS-only operation prevents downgrade attacks

Code Security Review

Our implementation can be verified through source code inspection:

            // All TOTP generation happens client-side
            async function generateTOTP(secret, timeStep = 30, digits = 6) {
            try {
            const key = base32ToBytes(secret);
            const time = Math.floor(Date.now() / 1000 / timeStep);
            const timeBytes = new ArrayBuffer(8);
            const timeView = new DataView(timeBytes);
            timeView.setUint32(4, time, false);

            // Uses Web Crypto API - no server communication
            const hash = await hmacSha1(key, timeBytes);
            return dynamicTruncate(hash, digits);
            } catch (error) {
            return '000000';
            }
            }
        

Privacy Guarantees

What We DON'T Do

Store or transmit your secret keys
Log generated TOTP codes
Track your usage patterns
Use cookies for tracking
Collect IP addresses or device fingerprints
Share data with third parties
Require user registration or accounts

Your Responsibility

While we ensure your data never leaves your device through our service, you're responsible for: keeping your secret keys secure, using trusted networks, maintaining updated browsers, and protecting your device from malware.

Security Best Practices

For Users

Use HTTPS: Always access our generator via https://totpgenerator.com
Verify URL: Check the address bar to ensure you're on the legitimate site
Keep browsers updated: Use the latest browser versions with security patches
Secure your device: Use device encryption and strong authentication
Don't share secret keys: Never share or transmit your TOTP secret keys
Use private browsing: Consider incognito mode for additional privacy

For Organizations

Network security: Use on trusted networks or VPN connections
Endpoint protection: Ensure devices have proper security software
Access controls: Limit who can access TOTP generators
Audit trails: Monitor TOTP usage in your organization
Backup strategies: Securely backup secret keys and recovery codes

Security Compliance & Auditing

Our TOTP generator meets various security standards and can be audited for compliance requirements:

✅

RFC 6238

TOTP Standard

✅

RFC 4226

HOTP Algorithm

✅

OWASP

Secure Coding

✅

CSP

Content Security

Organizations requiring formal security assessments can review our open-source code and conduct independent security audits. We welcome responsible disclosure of any security concerns.

Incident Response

In the unlikely event of a security issue:

Immediate notification: We'll publish security advisories on our website
Code updates: Any necessary fixes will be deployed immediately
User guidance: Clear instructions will be provided for user protection
Post-incident review: We'll conduct thorough analysis and improvements

Reporting Security Issues

If you discover a security vulnerability, please report it responsibly:

Email: security@totpgenerator.com
Response time: We aim to respond within 24 hours
Disclosure: We'll work with you on responsible disclosure timelines
Recognition: Security researchers are credited with permission

Start Using TOTP Securely

Experience client-side TOTP generation with our privacy-focused generator

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