WaveSign Blog

File authenticity guides

Practical guides to image authentication, PDF integrity, verification metadata, and tamper-evident workflows for visual evidence.

2026-06-13Image AuthenticationTamper Evidence

How to Prove an Image Has Not Been Edited

Learn how tamper-evident image authentication works, what it can prove, and why signed files need matching verification metadata.

2026-06-13PDF VerificationFile Integrity

WaveSign verifies signed image-PDFs using an invisible embedded signal, a signature JSON file, and the same secret key used at signing.

2026-06-13Insurance ClaimsImage Evidence

Insurance claim photos can become evidence. WaveSign helps teams sign images and later verify whether the signed files still match.

2026-06-13Invisible WatermarkingFile Integrity

Visible watermarks mark ownership. Invisible tamper-evident signals help verify whether a signed image or PDF still matches its signed state.

2026-06-13ComparisonFile Authentication

WaveSign and DocuSign solve different problems. Compare tamper-evident file authentication with traditional electronic signature workflows.

2026-06-13File AuthenticationTamper Evidence

Tamper-evident file authentication helps verify whether a signed image or PDF still matches its signed state.

2026-06-13MetadataAuthenticity

Metadata can help describe a file, but it is fragile. Learn why image and PDF authenticity needs a stronger verification package.