Your Data. Our Fortress.
Military-grade security that protects your sensitive W-9 data with bank-level encryption, automatic deletion, and zero-knowledge architecture.
Built for Compliance. Designed for Peace of Mind.
Every layer of W9Vault is designed with security-first principles, ensuring your sensitive data is protected at every step.
AES-256 Encryption
Bank-grade encryption protects your data both at rest and in transit.
30-Day Auto-Deletion
Documents are automatically deleted after 30 days for complete data privacy.
Zero-Knowledge Architecture
We never see your data. End-to-end encryption ensures complete privacy.
MAC Verification
File integrity verification ensures documents haven't been tampered with.
Technical Security Specifications
Enterprise-grade infrastructure built on industry-leading security practices.
Infrastructure Security
TLS Encryption
All data transmission protected with industry-standard TLS encryption
Rate Limiting
Protection against brute force attacks and abuse
Input Sanitization
All user inputs validated and sanitized for security
Content Security Policy
Browser-level protection against XSS and injection attacks
Data Protection
AES-256 Encryption
Military-grade encryption for all data at rest and in transit
Client-Side Encryption
Files encrypted in your browser using TweetNaCl library
30-Day Auto-Deletion
All documents automatically deleted after 30 days for privacy
Zero-Knowledge Architecture
We never see your file contents - complete privacy guarantee
Built-In Security Features
Every layer designed with security-first principles.
Authentication Checks
Secure user authentication with session validation and automatic timeout protection.
Audit Logging
Comprehensive activity logging for compliance and security monitoring without exposing sensitive data.
File Integrity
MAC verification ensures uploaded documents haven't been tampered with or corrupted.
Security FAQ
Common questions about W9Vault's security practices.
How secure is my data on W9Vault?
Your data is protected by military-grade AES-256 encryption, the same standard used by banks and government agencies. All data is encrypted both at rest and in transit, and we use a zero-knowledge architecture meaning we never see your sensitive information.
What happens to my data after 30 days?
All W-9 documents and associated data are automatically and permanently deleted after 30 days. This automatic deletion is cryptographically verified and cannot be recovered, ensuring complete data privacy and compliance with data retention policies.
What security standards does W9Vault follow?
W9Vault follows industry-standard security practices including AES-256 encryption, TLS data transmission, input sanitization, rate limiting, and comprehensive audit logging. We use a zero-knowledge architecture and automatic 30-day data deletion for maximum privacy.
Who has access to my data?
Only you and the vendors you send requests to have access to the data. W9Vault uses end-to-end encryption with a zero-knowledge architecture, which means our team cannot see or access your sensitive information even if we wanted to.
How do you protect against data breaches?
We use multiple security layers including client-side encryption with TweetNaCl, TLS data transmission, rate limiting, input sanitization, and Content Security Policy. Our zero-knowledge architecture means even in the unlikely event of a breach, your sensitive file contents would remain encrypted and unreadable.
Have Security Questions?
Have questions about our security practices, encryption implementation, or need technical details for your security review?