International standardisation has been active in specifying the requirements of the directive on electronic signatures. The European Commission can adopt and publish the reference numbers of standards relating to products of electronic signatures in Official Journal of the European Communities. In this task, the Commission is assisted by a committee with representatives from the member states.

Most related standardisation work in Europe is performed by EESSI , which is a joint project of the European standardisation organisations ETSI (SEC ESI WG) and CEN (WS/E-Sign) Furthermore, ETSI has submitted the following technical specifications:

• TS 101 456: Policy requirement for certification authorities issuing qualified certificate
• TS 101 733: Electronic Signature Formats
• TS 101 861: Time Stamping Profile
• TS 101 862: Qualified Certificate Profile
• TS 102 023: Policy requirements for time-stamping authorities
• TS 102 042: Policy requirements for certification authorities issuing public key certificates
• TS 101 903: XML Advanced Electronic Signatures
• TR 102 041: Signature Policies Report
• TS 102 030: Provision of harmonized Trust Service Provider status information

Further information about ETSI's standardisation as well as the above specifications can be downloaded from ETSI

The CEN publications within the area are CWA documents (CEN Workshop Agreement). The working committee has approved the following documents:

• CWA 14167-1: Security Requirements for Trustworthy Systems Managing Certificates for Electronic Signatures: Part 1 - System Security Requirements
• CWA 14167-2: Security Requirements for Trustworthy Systems Managing Certificates for Electronic Signatures: Part 2 - Cryptographic Module for CSP Signing Operations - Protection Profile (MCSO-PP)
• CWA 14168: Secure Signature-Creation Devices, version 'EAL 4'
• CWA 14169: Secure Signature-Creation Devices, version 'EAL 4+'
• CWA 14170: Security Requirements for Signature Creation Systems
• CWA 14171: Procedures for Electronic Signature Verification
• CWA 14172-1: EESSI Conformity Assessment Guidance: Part 1 - General
• CWA 14172-2: EESSI Conformity Assessment Guidance: Part 2 - Certification Authority services and processes
• CWA 14172-3: EESSI Conformity Assessment Guidance: Part 3 - Trustworthy systems managing certificates for electronic signatures
• CWA 14172-4: EESSI Conformity Assessment Guidance: Part 4 - Signature creation applications and procedures for electronic signature verification
• CWA 14172-5: EESSI Conformity Assessment Guidance: Part 5 - Secure signature creation devices
• CWA 14255: Guidelines for the implementation of Secure Signature-Creation devices

Further information about electronic signature standardisation in CEN as well as the above specifications, can be downloaded from the relevant web site

The results of the standardisation work of the Electronic Signature Committee have not been published up-to-date.