SIST EN ISO/IEC 27555:2025

SLOVENSKI STANDARD
01-maj-2025
Informacijska varnost, kibernetska varnost in varstvo zasebnosti - Smernice o
izbrisu identifikacijskih podatkov (ISO/IEC 27555:2021)
Information security, cybersecurity and privacy protection - Guidelines on personally
identifiable information deletion (ISO/IEC 27555:2021)
Informationssicherheit, Cybersicherheit und Datenschutz - Richtlinien zur Löschung
persönlich identifizierbarer Informationen (ISO/IEC 27555:2021)
Sécurité de l’information, cybersécurité et protection de la vie privée - Lignes directrices
relatives à la suppression des données à caractère personnel (ISO/IEC 27555:2021)
Ta slovenski standard je istoveten z: EN ISO/IEC 27555:2025
ICS:
35.030 Informacijska varnost IT Security
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN ISO/IEC 27555

NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2025
ICS 35.030
English version
Information security, cybersecurity and privacy protection
- Guidelines on personally identifiable information
deletion (ISO/IEC 27555:2021)
Sécurité de l'information, cybersécurité et protection Informationssicherheit, Cybersicherheit und
de la vie privée - Lignes directrices relatives à la Datenschutz - Richtlinien zur Löschung persönlich
suppression des données à caractère personnel identifizierbarer Informationen (ISO/IEC 27555:2021)
(ISO/IEC 27555:2021)
This European Standard was approved by CEN on 7 March 2025.

CEN and CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for
giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical
references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to
any CEN and CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN and CENELEC member into its own language and notified to the CEN-CENELEC
Management Centre has the same status as the official versions.

CEN and CENELEC members are the national standards bodies and national electrotechnical committees of Austria, Belgium,
Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia,
Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and United Kingdom.

CEN-CENELEC Management Centre:
Rue de la Science 23, B-1040 Brussels
© 2025 CEN/CENELEC All rights of exploitation in any form and by any means
Ref. No. EN ISO/IEC 27555:2025 E
reserved worldwide for CEN national Members and for
CENELEC Members.
Contents Page
European foreword . 3

European foreword
The text of ISO/IEC 27555:2021 has been prepared by Technical Committee ISO/IEC JTC 1 "Information
technology” of the International Organization for Standardization (ISO) and has been taken over as
Protection” the secretariat of which is held by DIN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by September 2025, and conflicting national standards
shall be withdrawn at the latest by September 2025.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN-CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a standardization request addressed to CEN and CENELEC by
the European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
Any feedback and questions on this document should be directed to the users’ national standards body.
A complete listing of these bodies can be found on the CEN and CENELEC websites.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO/IEC 27555:2021 has been approved by CEN-CENELEC as EN ISO/IEC 27555:2025
without any modification.
INTERNATIONAL ISO/IEC
STANDARD 27555
First edition
2021-10
Information security, cybersecurity
and privacy protection — Guidelines
on personally identifiable information
deletion
Sécurité de l’information, cybersécurité et protection de la
vie privée — Lignes directrices relatives à la suppression des
informations personnellement identifiables
Reference number
ISO/IEC 27555:2021(E)
© ISO/IEC 2021
ISO/IEC 27555:2021(E)
© ISO/IEC 2021
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 on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
© ISO/IEC 2021 – All rights reserved

ISO/IEC 27555:2021(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms.3
5 Framework for deletion . 3
5.1 General . 3
5.2 Constraints. 4
5.3 Clusters of PII . 4
5.4 Retention period and regular deletion period . 5
5.4.1 Retention period . 5
5.4.2 Regular deletion period . 5
5.4.3 Allocation of clusters of PII . 6
5.5 Archives and backup copies . . 6
5.6 Standard deletion periods, starting points, deletion rules and deletion classes . 7
5.7 Special situations . 7
5.8 Documentation of policies and procedures . 8
6 Clusters of PII . 8
6.1 General . 8
6.2 Identification . 9
6.3 Documentation . 10
7 Specification of deletion periods .10
7.1 Standard and regular deletion periods . 10
7.2 Regular deletion period specifications . 11
7.3 Standard deletion period identification . 11
7.4 Deletion period specifications for special situations .12
7.4.1 General .12
7.4.2 Modification of data objects .12
7.4.3 Need to extend period of active use . 13
7.4.4 Suspension of the deletion . 13
7.4.5 Backup copies . 13
8 Deletion classes .14
8.1 Abstract starting points — abstract deletion rules . 14
8.2 Matrix of deletion classes.15
8.3 Allocation of deletion classes and definition of deletion rules . 16
9 Requirements for implementation .16
9.1 General . 16
9.2 Conditions for starting points outside IT systems . 18
9.3 Requirements for implementation for organization-wide aspects . 18
9.3.1 General . 18
9.3.2 Backup . 18
9.3.3 Logs .
...