ISO/IEC INTERNATIONAL STANDARD 7064 First edition 2003-02-15 Information technology Security techniques Check character systems Technologies de I'information - Techniques de sécurité - Systemes decaracteresdecontrole Reference number ISO/IEC 7064:2003(E) ISO TEC @ISO/IEC2003 by IHS under lic Not for Resale ISO/IEC 7064:2003(E) PDFdisclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is atrademarkof AdobeSystems Incorporated. Detais of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below ?ISO/IEC2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ationalgazaiSandardizato ISO/IEC2003-Allrightsreserved ermittedwithoutlicense from IHS Not for Resale ISO/IEC7064:2003(E) Contents 1 Scope 1 2 Terms and definitions 1 3 Symbols and notation 2 4 Types of systems 2 4.1 Pure systems 2 4.2 Hybrid systems 2 5 Compliance and designation 2 5.1 Strings 2 5.2 Check character generating products 2 5.3 Checking products 2 5.4 System designation 2 6 Specification of pure systems 3 6.1 Formula 3 6.2 Calculation 4 6.3 Check character position 4 7 Computational methods for pure systems with one check character 4 7.1 Pure system recursive method 4 7.1.1 Computation 7.1.2 Example 5 7.2 Pure system polynomial method 5 7.2.1 Computation 5 7.2.2 Example 5 Computational methods for pure systems with two check characters 6 8.1 Computation 6 8.2 Example using recursive method 6 8.3 Example using polynomial method 7 8.4 Simplified procedure for ISO/IEC 7064, MOD 97-10 7 9 Specification for hybrid systems 7 9.1 Formula 7 9.2 Check character position 8 1o Computational method for hybrid systems 8 10.1 Hybrid system recursive method 8 10.1.1 Computation 8 10.1.2 Example . Annex A (informative) Criteria for the selection of check character systems for applications 10 Annex B (informative) Check character systems for other alphabets 12 Bibliography 13 Copyrightinteratinal organizaio for standaizaion - All rights reserved ii ded by IHS under se with I: nse from IHS Not for Resale ISO/IEC 7064:2003(E) Foreword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form thespecializedsystemforworldwidestandardization.Nationalbodiesthat aremembers ofISOorIECparticipateinthe development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical committees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting. Publication as an International Standard requires approval by at least 75 % of