Post Quantum Digital Signature for Secure eSignatures
Award-winning eSignature solution
What a post quantum digital signature is
A post quantum digital signature is a digital signing method designed to stay secure even if quantum computers become practical. It uses cryptographic algorithms that are intended to resist attacks that could weaken today’s signature systems. In practice, the signer creates a signature from the document’s hash, and the recipient verifies it with the matching public key and trust data. The goal is to protect authenticity, integrity, and long-term trust in U.S. electronic records.
Why post quantum digital signatures matter
They help preserve document integrity as cryptographic standards evolve, while supporting faster approvals and lower paper handling costs. Under ESIGN and UETA, electronic signatures can remain legally effective when intent, attribution, and record integrity are documented.
Common implementation challenges
Legacy signature systems may rely on algorithms that are not designed for future quantum threats. Weak signer authentication can make attribution harder to defend in disputes or audits. Poor retention practices can break the evidentiary record needed for long-term validation. Incomplete audit trails can leave gaps in timestamps, identity checks, and document history.
Who uses it and where
Regulated teams
Legal, finance, healthcare, and real estate teams use post quantum digital signature workflows for contracts, approvals, and regulated records.
Remote signers
Remote signers use it for lease packets, patient forms, loan documents, and internal approvals that need durable evidence.
People who benefit most
Teams in real estate and property operations often need signatures on leases, disclosures, and rental packets. signNow customer stories from Martin Properties and similar workflows show how mobile signing and clear audit records help keep transactions moving without in-person coordination. Operations leaders in finance, distribution, and enterprise services use signNow to route approvals across departments. Customer stories from Tech Data and Xerox fit this pattern, where integration with existing systems, document control, and signer visibility matter more than paper-based handling.
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Core features and benefits
Post quantum digital signature workflows need durable evidence, controlled access, and clear records that hold up across routine business and regulated use cases.
Integrity
Creates a tamper-evident record that helps preserve document integrity as signing workflows scale across teams and jurisdictions.
Attribution
Supports stronger signer attribution with authentication steps that help connect each signature to a specific person.
Audit trail
Keeps a time-stamped audit trail that records key actions, supporting review, dispute handling, and compliance checks.
Retention
Works with long-term retention practices so signed records stay available for legal, regulatory, or internal review.
Compliance
Fits regulated workflows by supporting controls that align with ESIGN, UETA, HIPAA, and 21 CFR Part 11 needs.
Workflow control
Reduces manual handling by keeping signature requests, approvals, and record storage in one digital workflow.
How it works step by step
The signing flow is sequential, with identity checks, signature creation, and record sealing captured in the final evidence set.
Open document: The signer opens the document and reviews the request. Verify identity: Authentication confirms the signer’s identity before signing. Apply signature: The system creates a signature and logs the event. Seal record: The record is sealed and stored with audit details.
Quick setup guide
Use a simple setup sequence to prepare, verify, send, and retain signed records in a controlled workflow.
Prepare file:
Upload the document and assign signer roles. Choose verification:
Set the authentication method for each signer. Send for signing:
Send the request and track completion status. Save records:
Download or store the signed record securely.
Recommended workflow settings
Configure identity checks, signature strength, retention, and encryption to match the document’s legal and operational needs.
| Setting | Recommendation |
|---|---|
| Authentication method | SMS OTP with ID review |
| Signature type | SES for routine U.S. contracts |
| Audit trail | Full time-stamped event log |
| Document retention | 6 years for HIPAA records |
| Encryption | TLS 1.2/1.3 and AES-256 |
Platform and device support
Use a modern browser or mobile app with secure TLS support to sign, review, and manage documents on desktop or mobile devices.
Desktop browsers Chrome, Firefox, Edge Desktop OS Windows, macOS Mobile OS iOS, Android
For enterprise deployments, managed Windows or macOS devices, mobile access on iOS and Android, and controlled browser settings help maintain consistent access. SSO, API access, and retention policies should be aligned with internal security standards and any regulated workflow requirements.
Security and compliance snapshot
Encryption:
Data protection:
Controls:
Certification:
Healthcare:
Regulated records:
Real-world use cases
Customer stories show how signNow fits mobile, integrated, and compliance-focused signing workflows across different business settings.
Real estate operations
A property operations team needed faster lease execution without losing record quality.
- Tim Martin at Martin Properties used online execution for mobile and offline workflows.
- The process kept approvals moving while preserving compliance and security records.
The workflow reduced paper handling and kept signed lease records organized for review, while supporting mobile execution and a clear compliance trail.
Enterprise operations
An enterprise operations team needed better routing across systems and departments.
- Kodi-Marie Evans at Xerox described flexible routing through NetSuite integration.
- The team could direct the right documents to the right signers in the right format.
The integration-centered workflow improved routing accuracy, reduced manual handling, and kept signature requests aligned with existing business systems and document formats.
Best practices for reliable signing
A controlled setup helps keep signatures defensible, records organized, and access limited to the people who need it.
Match verification to risk
Preserve the evidence chain
Set retention before sending
Restrict access by role
FAQ and troubleshooting
These answers focus on plan fit, signer verification, audit evidence, and retention rules that affect defensibility and compliance.
signNow Business includes legally binding eSignatures, audit trails, templates, and mobile apps. For HIPAA workflows, a BAA is required, and signed records should be retained for 6 years under 45 CFR §164.530(j)(2).
If a signer cannot complete verification, check the selected authentication method and the signer’s device access. Stronger methods such as SMS OTP or ID verification improve attribution, while ESIGN and UETA still require clear intent and record integrity.
If a document history looks incomplete, confirm that audit trail logging is enabled and that the signed file was exported after completion. A defensible record should include timestamps, signer identity details, and document actions.
Bulk send is included in signNow Business Premium. If you need higher-volume routing, compare plan limits before sending. The signed record still needs the same audit trail and retention controls for ESIGN and UETA defensibility.
For 21 CFR Part 11 workflows, use controls that support unique user identification, time-stamped audit trails, and secure access. signNow Enterprise and Site License options are the better fit when regulated recordkeeping is required.
If a signer needs mobile access, signNow supports iOS and Android workflows. Mobile signatures are valid under ESIGN and UETA when the signer intends to sign and the record is retained properly.
Vendor comparison at a glance
Major vendors support U.S. eSignature legality, but pricing models and transaction limits differ across plans and tiers.
| signNow | DocuSign | Adobe Sign | PandaDoc |
|---|---|---|---|
| ESIGN and UETA | Yes | Yes | Yes |
| Audit trail | Yes | Yes | Yes |
| HIPAA support | Yes | Yes | Yes |
| Envelope cap | No cap | 100/year | Tiered |
Rollout and retention timeline
A rollout plan should cover launch timing, team adoption, and the retention rules that govern signed records.
Setup day:
First send:
Team onboarding:
HIPAA retention:
Free trial:
Business plan:
Enterprise plan:
Site License:
Risks of poor implementation
Weak attribution
Incomplete trail
Retention gap
Legal challenge
What the audit trail records
The audit trail captures identity, timing, document integrity, and retrieval details needed for later review.
Signer authentication:
Timestamp capture:
Document hashing:
Tamper-evident sealing:
Audit record storage:
Trail retrieval:
Pricing and key plan features
Annual pricing and feature access vary by vendor, so plan fit depends on volume, compliance needs, and workflow complexity.
| signNow | DocuSign | Adobe Sign | PandaDoc | HelloSign | |
|---|---|---|---|---|---|
| Starting price | $8/user/mo | $15/user/mo | $14/user/mo | $19/user/mo | $15/user/mo |
| Free trial | 7 days | Not verified | Not verified | Not verified | Not verified |
| Bulk send | Business Premium | Not verified | Not verified | Not verified | Not verified |
| Audit trail | Included | Included | Included | Included | Included |
| HIPAA compliance | BAA required | BAA available | BAA available | Not verified | Not verified |
Key performance indicators that demonstrate SignNow's proven track record.