Entrust Signhost

Digital Sealing for PDF Documents

Document seals (also called e-seals or digital seals) act like a digital stamp on a document. The Entrust document sealing solution with Signhost uses digital certificates and digital timestamping technology to cryptographically bind an organization’s identity to their digital documents and lock down the document to help prevent further editing. This provides:

Document ownership and accountability
Verifiable proof of integrity
Reduced risk of fraud, forgery, and disputes

Launch Demo

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Key benefits

Verifiable Proof of Ownership and Authenticity

Digitally sealed documents with Entrust Signhost embed your legal entity’s exact name, verified by a trusted authority.

Trusted Timestamp Proving the Exact Date & Time of Sealing

Each sealed document is also timestamped. It lengthens the technical validity of the seal and helps prove the document’s existence from the timestamp’s date and time.

Advanced and Qualified Sealing Available

Entrust Signhost supports both advanced and qualified sealing + timestamping under the EU eIDAS Regulation.

Global Recognition

Our digital seals are generated using digital certificates issued by a Qualified Trust Service Provider listed under both the Adobe and EU trust lists.

Manual or API-automated process

You can manually seal documents using our web portal or fully automate the process using our REST API. Check out our API guide for sealing.

LTV-Enabled (Long-Term Validation) Seals

Our digital seals follow the PAdES long-term validation standard to optimize validation and archiving.

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Support Regulatory Compliance

Follow the eIDAS Standard

The EU eIDAS Regulation provides a legal and technical framework for the generation and verification of digital seals, also referred to as electronic seals.

Entrust Signhost can generate advanced and digital seals as defined by eIDAS to help you align with eIDAS or to help you comply with an eIDAS sealing mandate.

Timestamping is always included in our seals. Our qualified seals automatically benefit from qualified timestamping.

Fraud Mitigation

Increasing the Reliability of e-Invoices in Portugal

Portugal’s 2026 Budget Bill requires all PDF e-invoices to include a qualified electronic signature starting in 2027, boosting the adoption of qualified seals. This enhances invoice authenticity, reduces fraud, and strengthens digital tax compliance while giving businesses a more secure, efficient invoicing process that benefits the entire economy.