ISO INTERNATIONAL STANDARD 14533-4 First edition 2019-08 Processes, data elements and documents in commerce, industry and administration Long term signature profiles - Part 4: Attributes pointing to (external) proof of existence objects used in long term signature formats (PoEAttributes) Processus, eléments d'informations et documents dans le commerce, I'industrie et I'administration -Profils de signature a long terme Partie 4: Attributs pointant vers des objets externes de la Preuve de I'existence utilisés dans les formats de la signature a long terme Reference number IS0 14533-4:2019(E) ISo @ IS0 2019 IS0 14533-4:2019(E) COPYRIGHTPROTECTEDDOCUMENT @IS02019 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's member body in the country of the requester. ISO copyright office CP 40i : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone:+41227490111 Fax: +4122 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved