Preface:

Standards development within the Information Technology sector is harmonized with international standards development. Through the CSA Technical Committee on Information Technology (TCIT), Canadians serve as the Canadian Advisory Committee (CAC) on ISO/IEC Joint Technical Committee 1 on Information Technology (ISO/IEC JTC1) for the Standards Council of Canada (SCC), the ISO member body for Canada and sponsor of the Canadian National Committee of the IEC. Also, as a member of the International Telecommunication Union (ITU), Canada participates in the International Telegraph and Telephone Consultative Committee (ITU-T).

This Standard supersedes CAN/CSA-ISO/IEC 18014-3-04 (adoption of ISO/IEC 18014-3:2004, first edition, 2004-02-15). At the time of publication, ISO/IEC 18014-3:2009 is available from ISO and IEC in English only. CSA will publish the French version when it becomes available from ISO and IEC.

Scope:

This part of ISO/IEC 18014 describes:

• a general model for time-stamping services producing linked tokens,
• describes the basic components used to construct a time-stamping service producing linked tokens,
• defines the data structures used to interact with a time-stamping service producing linked tokens,
• describes specific instances of time-stamping services producing linked tokens, and
• defines a protocol to be utilized by time-stamping services producing linked tokens for the purpose of extending linked tokens to published values.