CSA 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 SCC Mirror Committee (SMC) 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 has been formally approved, without modification, by the Technical Committee and has been developed in compliance with Standards Council of Canada requirements for National Standards of Canada. It has been published as a National Standard of Canada by CSA Group. Scope This document specifies digital signature mechanisms with appendix whose security is based on the discrete logarithm problem. This document provides — a general description of a digital signature with appendix mechanism, and — a variety of mechanisms that provide digital signatures with appendix. For each mechanism, this document specifies — the process of generating a pair of keys, — the process of producing signatures, and — the process of verifying signatures. Annex A defines object identifiers assigned to the digital signature mechanisms specified in this document, and defines algorithm parameter structures. Annex B defines conversion functions of FE2I, I2FE, FE2BS, BS2I, I2BS, I2OS and OS2I used in this document. Annex D defines how to generate DSA domain parameters.