Security is the foundation of trust in electronic signatures. If a signed document can be tampered with, if a signer's identity can be spoofed, or if an audit trail can be manipulated, the entire system breaks down.
This guide covers the security measures that make e-signatures trustworthy — and how ZiaSign implements them to protect your business.
Security Fundamentals
Every e-signature system must provide four security guarantees:
- Authentication — Verify the signer is who they claim to be
- Integrity — Ensure the document hasn't been altered after signing
- Non-repudiation — Prevent signers from denying they signed
- Confidentiality — Protect document content from unauthorized access
ZiaSign provides all four through a combination of cryptographic techniques, identity verification, and comprehensive audit logging.
How ZiaSign Protects Your Documents
Encryption in Transit: All data is encrypted using TLS 1.3 with perfect forward secrecy during transmission.
Encryption at Rest: Documents are encrypted with AES-256 encryption in storage. Encryption keys are managed by Azure Key Vault with hardware security modules (HSMs).
Tamper Evidence: Every signed document receives a SHA-256 hash sealed in the audit trail. Any modification — even changing a single byte — is immediately detectable.
Identity Verification: Multi-factor verification including email, SMS, knowledge-based authentication (KBA), and government ID verification.
Infrastructure: SOC 2 Type II certified, running on Microsoft Azure with 99.9% uptime SLA, automatic failover, and geographically redundant backups.
Compliance Certifications
ZiaSign maintains the following security certifications and compliance:
| Certification | Status | Scope |
|---|
| SOC 2 Type II | Certified | Security, availability, confidentiality |
| GDPR | Compliant | EU data protection |
| HIPAA | Ready | Healthcare data, BAA available |
| eIDAS | Compliant | EU electronic identification |
| ISO 27001 | In progress | Information security management |
| CCPA | Compliant | California privacy |
Best Practices for Your Organization
Even with a secure platform, your organization's practices matter:
- Enable multi-factor authentication for all admin accounts
- Set up IP allowlists for sensitive document access
- Define role-based permissions — not everyone needs full access
- Review audit logs regularly — spot unauthorized access early
- Establish a document retention policy — define how long signed documents are stored
- Train your team on phishing awareness — social engineering bypasses technical controls