ETSI Baseline Signatures & Long-Term Validation (LTV)
High-throughput generation of PDF (PAdES), XML (XAdES), and CMS (CAdES) digital signatures with long-term archiving capabilities.
Long-Term Archival (LTA) Architecture
SignHSM automatically generates baseline signatures conforming to ETSI EN 319 142-1, packaging validation data (DSS dictionary and VRI) directly into the PDF structure to ensure document validity remains verifiable even after root certificates expire.
Zero-Knowledge Document Hashing
The Cloud Signature Consortium (CSC) API implementation allows enterprise clients to send only the SHA-256/SHA-512 hash of the document to SignHSM, guaranteeing complete data sovereignty and strict compliance with medical and financial privacy laws.
- PAdES-B-LTA Compliance: Embedding cryptographic timestamps, complete certificate chains, and OCSP revocation tokens for 30+ year validity.
- RFC 3161 Hardware Timestamps: Line-rate timestamp token creation synchronized to stratum-1 atomic reference time sources.
- Parallelized Digest Hashing: Client-side document hashing ensuring confidential document contents never transit network boundaries.
- Automated Certificate Path Validation: Hardware-accelerated validation of intermediate CA hierarchies and CRL distribution points.
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