A-Trust Company Profile

A-Trust (founded in February 17, 2000) is an accredited TrustCenter in Austria issuing smartcard based qualified certificates for Austrian citizen used in eGovernment etc.

On March 11, 2002 A-Trust has been accredited according to § 17 of the Austrian Signature Law by Telekom-Control-Kommission, the Austrian supervisory body.

A-Trust must report its services to the supervisory authority for the Austrian market the Telekom- Control Commission.

All services reported to the supervisory authority can be found here:

A-Trust's product range comprises user certificates, developer certificates and corporate certificates as well as consultation services and support with the development of e-commerce and signature applications in accordance with the Directive 1999/93/EC.

Our References

  • Vienna University of Economics and Business Administration
  • Membership cards for the Austrian Federal Economic Chamber and the Austrian Ministry of Finance. 
  • Austrian Federal Economic Chamber

Address and Contact 

Gesellschaft für Sicherheitssysteme
im elektronischen Datenverkehr GmbH

Landstraßer Hauptstraße 5
A-1030 Wien
Phone. +43 (1) 713 21 51/0
Fax. +43 (1) 713 21 51/350
Mail. office@a-trust.at
DVR-Number: 1065181 - FN: 195738a

Terms and Conditions 

Fingerprint of A-Trust Root Certificates 

The following p7b file contains all issuing certificates required to verify end user certificates.

Certificate Polices/Practice Statements 

Certificate Policies
Certificate Practice Statements

Certificate Revocation Service

Certificate Revocation is possible 24 hours a day using the following toll-free number:
+43 (0) 1 715 20 60
Revocation is compulsory upon loss or compromise of the keys.

Directory Service

A-Trust's Directory contains all CRLs (Certificate Revocation Lists), CA Certificates and a selection of user certificates, since A-Trust customers may choose whether they want their certificate to be listed in the directory or not.

The A-Trust directory can be accessed via


Searchbase: c=AT
Port: 389