Cloud Signature Consortium API

The Cloud Signature Consortium (CSC) API 1.4 provides a standardized REST interface for cloud-based digital signature services. This implementation enables applications to create Qualified Electronic Signatures (QES) using A-Trust Qualified Remote Signature services without requiring direct access to the user's signature creation device.

The API follows the Cloud Signature Consortium API Specification Version 1.4 and supports the complete signing workflow, including credential discovery, authorization, and remote signature creation.

Test-System

For testing purpose the following parameters can be used:

• URL: https://testbox.a-trust.at/hashsigning/2/csc/v1/
• username: 1030121749133712
• password: 123456789
• TAN: 123456

note

The test system is intended for development and integration testing only. It does not create legally valid qualified electronic signatures.

Additional resources

• Download API Specifications
• Github: Example client: https://github.com/A-Trust/CSC_HashSignClient