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Terms of Reference (ToR) for Technical Committee (TC) Electronic Signatures and Trust Infrastructures (ESI)


Approved at Board#145, November 2023

Areas of activity

TC ESI is responsible for standardization within ETSI supporting current and upcoming technology for trust services relating to Electronic Signatures and other trust services such as registered electronic delivery, electronic seals, electronic attestation of attributes and electronic archival. This includes trust service data formats, Identification procedures and policy and audit requirements for trust infrastructures supporting such trust services. This is aimed at supporting regulatory requirements such as the eIDAS Regulation as well as general international and commercial requirements.

TC ESI is the lead body within ETSI in relation to electronic signatures, and other trust service Infrastructures, to ensure trust and confidence in electronic transactions by:

  1. Developing European Standards and other standardisation deliverables, generic standards, guides and reports 
  2. Liaising with other ETSI bodies
  3. Liaising with bodies external to ETSI 
  4. Establishing a continuing work plan.

TC ESI has over 20 years experience in standardisation for Electronic Signatures and Trust Infrastructures. Its standards for signature formats have been recognised under European regulations and adopted by a number of countries around the world. It’s best practices standards for trust service providers and their audit have been adopted across Europe and is recognised by major IT providers.

Annex 1 (Informative): Collaboration with other bodies (both inside and outside ETSI)

TC ESI has partnerships with a number of trade and standards organisation bodies around the world including:

ETSI Groups


External Groups

  • ACAB’c
  • Arab-African e-CA Network
  • Asia PKI Consortium
  • CA/Browser Forum
  • CEN (TC 224, TC 331)
  • Cloud Signatures Consortium
  • European Cooperation for Accreditation (EA)
  • GSMA
  • ISO/IEC JTC 1 SC17 and SC27
  • ISO TC 154
  • ISO TC171/SC 2/WG 8
  • IETF
  • OpenID Foundation
  • Open Banking Exchange
  • PKI Consortium
  • UPU