Common Digital Signature Algorithms for SignNow Workflows

Award-winning eSignature solution

What common digital signature algorithms are

Common digital signature algorithms are cryptographic methods that let a person sign a digital document and let others verify that the document came from that signer and was not changed. In practice, the signer creates a hash of the file, signs that hash with a private key, and the recipient checks it with the matching public key. In the U.S., these algorithms support secure electronic transactions by proving identity, preserving integrity, and creating evidence that can be reviewed later.

Why digital signatures matter in the U.S.

They reduce paper handling, speed approvals, and create verifiable records for ESIGN and UETA purposes. When paired with proper consent, authentication, and audit evidence, they support enforceable electronic transactions across many business workflows.

Why teams look for DocuSign alternatives

Common implementation challenges

Weak signer authentication can make it harder to prove who actually approved the document.
Poor key management can expose private keys and undermine signature trust.
Missing audit details can weaken evidence when a signature is disputed later.
Using outdated algorithms or hashes can create compatibility and security problems.

Business workflows

Organizations use digital signatures for contracts, approvals, disclosures, and records that need traceable consent.

Regulated documents

Teams use them for forms, agreements, and regulated records that need secure signer identity.

People who benefit most

A NetSuite operations leader at Xerox uses signNow to route the right signatures to the right documents, with integration-driven formatting and approval control across finance and operations workflows.
A founder at Martin Properties uses signNow to execute lease and property documents online, keeping mobile signing, offline access, and compliance evidence in one workflow.

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Identity proof

Creates a verifiable signature record that links the signer, the document, and the signing event for later review.

Tamper evidence

Detects document changes after signing, so tampering is easier to spot and disputes are easier to assess.

Audit trail

Supports secure audit trails that record time, action, and signer activity in a reviewable sequence.

Cross-device use

Works with mobile and desktop signing, which helps teams complete approvals without waiting for paper.

Legal support

Fits ESIGN and UETA workflows when consent, intent, and attribution are documented correctly.

Workflow control

Scales across departments with templates, routing, and repeatable signing steps for routine documents.

Integration options for signing workflows

Connected systems move signed documents into the tools teams already use, reducing manual re-entry and keeping records aligned.

How the signing process works

The signing flow follows a simple cryptographic sequence from document preparation to verification.

Open document: The signer opens the document and reviews the request.
Verify signer: The system captures identity and signing intent.
Create signature: The document is hashed and signed with a private key.
Check integrity: The recipient verifies the signature with the public key.

Quick signing setup steps

Use a short setup sequence to move a document from draft to completed record.

Prepare file:
Upload the document and choose the signing order.
Set fields:
Add required fields and signer roles.
Request signature:
Send the document for signature.
Archive record:
Store the completed record with its audit trail.

Setting	Recommendation
Authentication method	SMS OTP with ID verification
Signature type	Advanced electronic signature
Audit trail	UTC timestamps and event log
Document retention	6 years for HIPAA records
Encryption	TLS 1.2/1.3 and AES-256

Browser and device requirements

Use a modern browser or mobile app with TLS support, current device security, and stable internet access.

Desktop browsers Chrome, Firefox, Edge
Desktop OS Windows 11, macOS
Mobile OS iOS, Android

For enterprise deployments, managed devices, SSO, API access, and retention controls matter more than the device itself. Windows, macOS, iOS, and Android are all practical options when the browser or app is current and the organization enforces access policy, encryption, and user provisioning rules.

Security and compliance snapshot

Encryption:

TLS 1.2/1.3 in transit

Data storage:

AES-256 at rest

Compliance:

SOC 2 Type II available

Security management:

ISO 27001 certified

Healthcare use:

HIPAA support with BAA

Regulated workflows:

eIDAS and 21 CFR Part 11 support

NetSuite operations

A NetSuite operations leader needed signatures routed to the right documents without manual rework.

Kodi-Marie Evans at Xerox used signNow with NetSuite.
The workflow matched document format and signer order.

The team gained more control over routing and document formatting, which reduced back-and-forth and helped keep approvals aligned with internal systems and recordkeeping needs.

Real estate

A property founder needed online execution for leases and related forms across mobile and office workflows.

Tim Martin at Martin Properties signed documents online.
Mobile and offline access kept work moving.

The workflow supported secure execution, faster turnaround, and a cleaner record of completed documents, which is useful when teams need both speed and documented signing evidence.

Practical implementation guidance

Good signing programs pair identity checks, retention policy, and evidence handling with the document type and regulatory context.

Match authentication to risk

Use stronger identity checks for higher-risk documents, and reserve simpler methods for low-risk acknowledgments with clear consent and attribution.

Protect signing credentials

Keep private keys and signer credentials protected, and limit access to approved users and managed devices.

Preserve evidence together

Retain audit trails with completed documents, timestamps, and delivery records so disputes can be reviewed later.

Align policy with regulation

Review retention and compliance rules before rollout, especially for HIPAA, FERPA, and financial records.

Day 0:

Set up the account, templates, and signer roles.

Day 1:

Send the first document after consent is captured.

Week 1:

Onboard the core team and review audit trail access.

7-day trial:

Free trial lasts 7 days with no credit card.

HIPAA retention:

Keep signed PHI records for 6 years per 45 CFR §164.530(j)(2).

Part 11 records:

Maintain secure audit trails and validation evidence for regulated records.

UETA adoption:

UETA has been adopted in 49 states, plus D.C., Puerto Rico, and the U.S. Virgin Islands.

FIPS 186-5:

Use RSA, ECDSA, or EdDSA for approved digital signatures.

Risks of poor implementation

Weak attribution

A court may question attribution.

Poor audit trail

Evidence may be excluded.

Retention gap

Records can fail retention rules.

Disputed enforceability

The signature may be challenged.

Signer authentication:

Verifies the signer before the signature event is accepted.

Timestamp capture:

Records the exact UTC time of each signing action.

Document hashing:

Hashes the document to create a fixed integrity fingerprint.

Tamper-evident sealing:

Seals the record so later changes are detectable.

Audit record:

Stores the event history with signer and device details.

Retrieve and export:

Exports the trail for review or legal use.

Recommended	DocuSign	Adobe Sign	PandaDoc
ESIGN and UETA	Yes	Yes	Yes
Audit trails	Yes	Yes	Yes
Starting price	$8/user/mo	$15/user/mo	$14/user/mo
Free trial	7-day trial	Trial available	Trial available
Envelope cap	No cap	100 envelopes/year	Not verified

	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-day trial	Trial available	Trial available	Trial available	Trial available
Bulk send	Business Premium	Not verified	Not verified	Not verified	Not verified
Audit trail	Included	Included	Included	Included	Included
Envelope cap	No cap	100/year	Not verified	Not verified	Not verified

FAQ and troubleshooting

These answers focus on plan limits, compliance requirements, and evidence handling for electronic signatures.

signNow Business includes legally binding eSignatures, audit trails, templates, mobile apps, and unlimited users. For HIPAA workflows, a BAA is required, and signed records should be retained for 6 years under 45 CFR §164.530(j)(2).

The 7-day free trial requires no credit card. It is useful for testing signing flows, templates, and basic document routing before choosing a paid plan.

Bulk send is included in Business Premium. If you need higher-volume distribution, that plan adds bulk send, kiosk mode, request payments, and quick invite links.

For HIPAA use, signNow supports compliance with a BAA. The workflow still needs unique user identification, access controls, integrity controls, and audit controls under the HIPAA Security Rule.

For 21 CFR Part 11 workflows, use validated processes, secure audit trails, and unique user credentials with two components. The record must preserve timestamps, history, and signer meaning.

If a document is disputed, the audit trail, timestamps, and signer authentication details help support attribution under ESIGN and UETA. The record should show who signed, when, and how.

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