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Content for chapters of the TDD other than HLA (chapter 1)

https://code.europa.eu/oots/tdd/tdd_chapters/-/wikis/home

Digital Signature Service : creation, extension and validation of advanced electronic signatures

Examples of DSS integration

A source code of Cellar, which is a service and data repository that manages large amounts of EU legal content, publications and reference datasets and serves as the central dissemination repository of the Publication Office.

The PreserveEU system is a digital preservation solution to ensure the long-term validity, integrity, and authenticity of electronically signed documents. Instead of applying multiple timestamps to each document (as in traditional extension methods), it leverages a Merkle Tree (Hash Tree) structure to efficiently group document hashes and preserve them collectively.

By combining cryptographic hashing and trusted timestamps, PreserveEU offers a scalable, secure, and cost-efficient way to maintain compliance and protect digital evidence for decades.

Web and command-line application supported by the European Commission’s DIGIT for the validation of CSV data.