Authentic PDF Digital Signatures - Adobe Acrobat Green Check Verification
Get authentic PDF signatures with Adobe Acrobat green checkmark verification. Prove document integrity and authenticity with certified digital sealing technology.
Certify your PDFs haven't changed since we sealed them for you - without leaving Acrobat
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Authentic PDF Digital Signatures with Adobe Acrobat Green Check Verification
What Makes PDF Signatures Authentic
When Adobe created the Portable Document Format (PDF), they included the ability to Seal a document. It’s a way to mathematically prove that a PDF hasn’t changed since the seal was applied. This is the technology that services like DocuSign and Adobe eSigning Solutions use to prove a document hasn’t been altered after the seal is applied. This protects signatures in agreements and contracts. It can protect pdf reports provided by a company or a department with a legally valid distinction between legitimate and fraudulant reports.
Understanding PDF Sealing & Verification
Digital sealing (also called digital signing) proves two important things about your PDF documents:
- Authenticity: Confirms who (an individual or a company) signed the document.
- Integrity: Ensures the document hasn’t been changed after signing.
How PDF Sealing Works
Step 1: Creating a Digital Fingerprint
Every PDF has a unique digital fingerprint—called a hash—created by applying a special mathematical function. If even one small detail of the document changes, the fingerprint changes completely.
Step 2: Signing the Fingerprint
Trusted Signers uses a secure digital key (similar to a secret stamp) to “seal” this fingerprint. This creates a secure certificate known as a digital signature.
Step 3: Embedding the Signature
This digital signature is then securely embedded into the PDF. The document is now “sealed”.
How PDF Authentication Works
When someone opens your digitally sealed PDF:
- The PDF viewer software (like Adobe Acrobat) examines the embedded signature.
- It compares the current document’s fingerprint with the fingerprint in the signature.
- If they match exactly, the viewer confirms that:
- The PDF is authentic.
- It was signed by the indicated signer.
- Nothing has changed since it was sealed.
If anything has been altered, the verification fails, clearly alerting the reader.
Benefits of Authentic Digital Signatures
- Trust: Anyone viewing the document knows it’s authentic and unchanged.
- Security: Prevents forgery, tampering, and backdating.
- Compliance: Accepted by courts, auditors, and regulatory authorities worldwide.
Trusted Signers makes this process simple, secure, and accessible.
Learn more about our secure PDF signing process and easy-to-use tools.
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