Why use Ascertia’s ADSS LTANS Evidence Server?

Ascertia’s Long-term Archive and Notary (LTAN) Evidence Server is a valuable tool for organisations that need to comply with regulatory requirements, protect electronic document integrity, improve efficiency, and reduce costs.

The server is compliant with Internet Engineering Task Force (IETF) LTANS specifications, which are the industry standard for long-term electronic document archival. ADSS LTANS also supports the use of digital signatures and timestamping to ensure the authenticity and integrity of these documents. It uses a variety of security measures to protect document confidentiality, integrity and availability while automating the archival and retrieval process.

Signed Document

Keep your business-critical documents safe long-term with ADSS LTANS Evidence Server


Long-term security

– Documents are protected long term, months, years and even decades into the future


Flexible data storage

– Internally, within business applications, local file systems, or secure cloud platforms


Standards compliant

– ADSS LTANS Evidence Server is fully compliant with Request for Comments (RFC) 4998 XMLERS

ADSS Server Modules Diagram

Key Benefits

  • Compliance

    – ADSS LTANS Evidence Server helps organisations meet strict regulations that require electronic documents to be archived long-term.

  • Improved efficiency

    – Ascertia’s ADSS LTANS supports organisational integrity through streamlined document management processes by automating the archiving and retrieval process of electronic documents.

  • Reduced overheads

    – It can help enterprises reduce the costs associated with document storage and management by storing electronic documents in a secure, centralised location.

We are always searching for ways to enhance how we support our extensive network of manufacturers. Through Ascertia’s bulk signing capabilities, we have accelerated projects and raised our high levels of customer care even higher.

Ray Wagner

Senior Software Product Manager

Shared Software

Document longevity and cross-border business

Ascertia’s Sam Crook and Mike Hathaway discuss the importance of document longevity when working across borders.

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What is a long-term archive and notary server (LTANS)?

Long-term archive servers

An LTAN Server is a system designed to store data for extended time periods, up to and including decades and even centuries. These servers often store data that requires preservation for future generations, such as historical documents, scientific data, and financial records.

Notary servers

Notary Servers provide secure and tamper-proof digital document storage. They use various technology to ensure stored documents cannot be altered or deleted without leaving a record in an audit trail. These servers are often used to store important documents, such as contracts, wills, and patents.

Ascertia’s ADSS LTANS Evidence Server combines both functionalities into one product. It stores data for extended periods, uses advanced security measures to protect data and can be scaled to store significant data volumes.

How is Ascertia’s ADSS LTANS Evidence Server different from standalone Long-term archive and notary servers?

ADSS LTANS is not a standalone server – it is a software application that organisations can install on various servers. This means you can use existing infrastructure to store your data, saving you costs.

Additionally, it is specifically designed for long-term archiving and notarisation. ADSS LTANS Evidence Server has features that are not typically found on its standalone counterparts. This includes the ability to refresh timestamp evidence records using new algorithms and updated PKI certificates.

What features does Ascertia’s ADSS LTANS Evidence Server offer?

Interoperability and flexibility

Organisations can use multiple archive profiles for varying business requirements or document types. There are various retention policies available, including the option of auto-deleting archived objects at the end of their retention period.

Flexible data storage

Organisations have several options to store Archive Data Objects and Evidence Record Syntax (ERS) Data, including the following:

  • Within its own database
  • It can return the data to the original business application for local storage
  • On a local file system
  • Published to an online URL

High availability

ADSS LTANS Server can be built to use various platforms. This is achieved through Hardware Security Modules (HSMs) from different vendors, as well as multiple internal or external Time Stamp Authorities (TSAs) and Certificate Authorities (CAs).

Does ADSS LTANS Server integrate with existing business applications?

Multiple integration options are available. This includes high-level client Application Programming Interface (API) in Java and .Net, driving HTTP and web-service protocols, as well as ADSS Auto File Processor (AFP)-based watched folder processing.

Is ADSS LTANS Evidence Server secure?

Security is a top priority. Provenance data can be retained within the evidence record:

  • Existing signatures can have the verification information saved with the archived object
  • Notary signatures can be applied to the archived object as an option
  • Evidence records can be exported for independent storage or review

Because cryptographic algorithms become weaker over time, the ADSS LTANS Evidence Server supports the ability to refresh the evidence records using new algorithms and updated public key infrastructure (PKI) certificates. This ensures documents are safe and secure long into the future.
For more information view our datasheet.

What operating systems and databases are supported?

ADSS LTANS Evidence server supports the following operating systems:

  • Microsoft Server 2022, 2019, 2016
  • Linux RedHat, SUSE, CentOS, and Ubuntu

It also supports the following databases:

  • Microsoft SQL Server 2022, 2019, and 2017
  • Oracle 19c, 18c
  • Azure SQL Database – Database-as-a-Service (DaaS)
  • PostgreSQL 14, 13, 12, 11
  • MySQL 8 and 5
  • Percona-XtraDB Cluster 8, and 5

For more information, download the ADSS LTANS Evidence Server datasheet.

What cryptographic algorithms and security modules are supported?

ADSS LTANS Evidence server supports strong signing and hash algorithms. These are continually updated with the most recent and secure. We current support the following:

  • Rivest Shamir Adleman (RSA) 2048, 3072, 4096 and 8192
  • Elliptic Curve Digital Signature Algorithm (ECDSA) 256, 384 and 521
  • Secure Hash Algorithm (SHA) 256, 385, 512 and others

It also supports the following security modules:

  • Thales Luna and Protect Server
  • Entrust nShield
  • Utimaco SS & CS CPS
  • Microsoft Azure Key Vault
  • Amazon Web Services (AWS) Cloud Hardware Security Module (HSM) – Linus only

What standards are supported?

Ascertia’s Long-term Archive and Notary Server meets the following certifications and standards:

  • RFC 4998 XMLERS – ADSS LTANS is fully compliant with the RFC 4998 XMLERS (Extensible Language Markup Language Evidence Record Syntax). Documents can be protected through the entire archive period using secure timestamps (RFC 3161 and RFC 5816).
  • RFC 6283– It complies with the IETF’s RFC 6283 standards for LTANS specifications, in particular XMLERS.
  • Long-term Archive Protocol (LTAP) – It also supports the LTAP, defining the request/response messages for accessing the web service.