Bringing Trust to Digital Documents

SigVerify makes it simple to verify the cryptographic authenticity of Aadhaar eSign and DSC-signed PDFs in India.

The Mission

In recent years, India has seen a massive shift toward digital signatures. Millions of documents contracts, government filings, and banking forms are signed every day using Aadhaar eSign and digital signature certificates (DSC).

However, a critical problem remains: most people don't know how to verify if a signature is actually valid. A stamped image on a PDF is not a real signature. True verification requires checking the embedded cryptographic X.509 certificate, the secure timestamp, and ensuring the document hash hasn't been tampered with since signing.

SigVerify was built to bridge this gap. We provide a clean, simple, and private tool that runs the complex cryptographic checks in the background, giving legal professionals, developers, and everyday citizens absolute certainty about their documents.

Want the full technical deep dive?

Read the story of why I built this, the complexities of Aadhaar's 30-minute session certificates, and the ASN.1 backend architecture.

Read the Article

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Aadhaar Aadhaar eSign
Google Auth Secure Auth
Cloudflare Global Edge
GitHub Education GitHub Education
Firebase Firebase Auth/DB